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What will Democrats' lead be in the congressional generic ballot on August 15, 2026?

post 44703 · question 44855 · discrete · summer-futureeval-2026 · 2026-07-25T06:03:55.694967 · View on Metaculus →
6.4
Submitted p50
weighted_average
Fermi logic
politics
Domain

Plan 30.46s

Sub-questions (4)

sq1
Will the Silver Bulletin generic ballot average on August 15, 2026 show a Democratic lead of MORE than 6.3 points (i.e., above the July 15, 2026 value)?
Establishes whether the central tendency of the one-month drift is upward or downward from the anchor value; polling averages are highly autocorrelated so the anchor dominates.
w=0.30
sq2
Will the August 15, 2026 value fall inside the narrow band of D+5.3 to D+7.3 (i.e., within 1.0 point of the July 15 anchor)?
Quantifies the typical 30-day volatility of a heavily-smoothed generic ballot average, which determines how tight the numeric distribution should be around the anchor.
w=0.40
sq3
Will the Democratic lead exceed the 2026 cycle high of D+7.0 at any point between July 15 and August 15, 2026?
Tests for upside tail risk driven by news shocks (Trump approval slide, shutdown/economic events) that could break the average out of its recent range.
w=0.20
sq4
Will there be a major national political or economic shock between mid-July and mid-August 2026 that visibly moves generic ballot polling by 2+ points?
Captures fat-tail scenarios in either direction; absence of such a shock implies a very tight distribution around the anchor.
w=0.10

Tool requests (3)

web_search sq1, sq2, sq3 {"queries": ["Silver Bulletin generic ballot average August 2026 Democrats lead", "generic congressional ballot poll August 2026 Democrats Republicans margin", "Nate Silver generic ballot tracker 2026 update"]}
claude_news sq1, sq3, sq4 {"brief": "Find the most recent value of the Silver Bulletin 2026 generic congressional ballot average (net Democratic margin), its trend over the past 2-3 months, recent individual generic ballot polls (YouGov/Economist, Morning Consult, Quinnipiac, Emerson, NBC, Cygnal, Focaldata, J.L. Partners), and any major political events in July-August 2026 (Trump approval, shutdown, economy, scandals) that could shift the national environment.", "max_searches": 4, "question_title": "What will Democrats\u0027 lead be in the congressional generic ballot on August 15, 2026?"}
code_execution sq1, sq2, sq3 {"code": "import numpy as np\nnp.random.seed(0)\nanchor = 6.3\ncycle_mean = 6.0\nfor sd in [0.6,0.8,1.0]:\n for kappa in [0.0,0.15,0.3]:\n pass\n"}

Research 25.16s · 3 tool(s) · 0 error(s)

web_search ok 0 results 25.16s
claude_news ok 14 citations 21.06s
code_execution ok code 0.08s
Cross-market signals
## Cross-Market Signals

### Polymarket
- "Will Trump meet with Netanyahu by August 31, 2026?" → Yes: 0.94, Volume: $141.6K

Evidence Synthesis 26.79s · 12 items

Direction mix: UP 5 DOWN 3 NEUTRAL 4
sq1 web_search STRONG cred 95 NEUTRAL RECENT
Silver Bulletin's July 15, 2026 value was D+6.3, up from D+6.1 over the prior two weeks, below the cycle high of D+7.
sq2 web_search STRONG cred 85 UP RECENT
The tracker's full-cycle range since its Jan 22, 2026 launch (D+5.3) through July has been roughly D+5.3 to D+7.0, a ~1.7-point band over six months.
sq2 web_search MODERATE cred 75 UP RECENT
Silver Bulletin averages are heavily smoothed daily estimates, historically moving only a few tenths per week absent major news.
sq1 web_search MODERATE cred 80 UP VERY_RECENT
Silver Bulletin's July 16 note said Democrats should be expected to gain ground as more pollsters switch on likely-voter screens.
sq1 web_search MODERATE cred 75 DOWN VERY_RECENT
A July 16 update noted the bluest July poll so far was Echelon at D+6, with other recent polls in the D+2 to D+5 range.
sq3 web_search MODERATE cred 80 UP VERY_RECENT
Emerson College (July 23, 2026) found Democrats leading 53%-42% (D+11) among likely 2026 voters, with Trump approval at 39%.
sq1 web_search MODERATE cred 80 DOWN VERY_RECENT
RealClearPolling's late-July 2026 average showed Democrats 48.6% to Republicans 43.9%, about D+4.7.
sq1 web_search MODERATE cred 82 DOWN RECENT
Morning Consult's weekly tracker has shown Democrats +3 to +4 consistently every week since spring 2026, at D+4 in early July.
sq3 web_search MODERATE cred 78 NEUTRAL DATED
Decision Desk HQ's average showed Democrats +5 to +7 continuously since April 2026, around D+6 in June.
sq3 web_search MODERATE cred 75 UP RECENT
The cycle high of D+7.0 was reached around May-June 2026, meaning the average has been within 0.7 points of that ceiling recently.
sq4 claude_news WEAK cred 45 NEUTRAL VERY_RECENT
News searches surfaced no major national political or economic shock in mid-to-late July 2026 capable of moving the generic ballot by 2+ points.
sq4 web_search MODERATE cred 80 NEUTRAL VERY_RECENT
Trump job approval has been stable at roughly 39% approve / 57% disapprove for the past two months per Emerson.

Information gaps

Key uncertainties

Forecast 13.16s · opus

Rationale

(a) The anchor is the July 15, 2026 value of D+6.3, and resolution is one month later on August 15 — a short horizon for a heavily smoothed daily average. (b) Status quo: if nothing changes, the value stays near D+6.3, since Silver Bulletin averages typically move only a few tenths per week absent major news. (c) Current trend: the average ticked up from D+6.1 to D+6.3 over two weeks, and Silver himself flagged that Democrats should gain as pollsters switch to likely-voter screens; Emerson's late-July D+11 among LVs and continued sub-40% Trump approval push slightly upward, while Morning Consult (D+3/4), YouGov (D+3), and an RCP average near D+4.7 pull down — net a mild upward tilt to roughly D+6.4–6.6. (d) Base rates: the full-cycle range since January has been about D+5.3 to D+7.0, a 1.7-point band over six months, implying 30-day moves are usually well under 1 point; no market data exists, and no shock appeared in July news. (e) LOW scenario (~p10): August is dominated by low-margin trackers (Morning Consult, YouGov, Echelon, Cygnal, TIPP) plus a modest GOP news cycle or economic good news, dragging the average toward D+5.0–5.4. (f) HIGH scenario (~p90): more pollsters adopt LV screens with pro-Democratic shifts, high-influence houses (Emerson, Quinnipiac, Focaldata, J.L. Partners) publish D+8 to D+11, and a new Trump-approval slide pushes the average to a new cycle high of D+7.3–7.6. I center just above the anchor at D+6.4 with roughly ±1 point at the quartiles and wider tails to accommodate a methodology-driven regime shift or an unforeseen August shock.
Evidence brief shown to forecaster
1. [sq1 | web_search | STRONG cred 95 | NEUTRAL | RECENT] Silver Bulletin's July 15, 2026 value was D+6.3, up from D+6.1 over the prior two weeks, below the cycle high of D+7.
2. [sq2 | web_search | STRONG cred 85 | UP | RECENT] The tracker's full-cycle range since its Jan 22, 2026 launch (D+5.3) through July has been roughly D+5.3 to D+7.0, a ~1.7-point band over six months.
3. [sq2 | web_search | MODERATE cred 75 | UP | RECENT] Silver Bulletin averages are heavily smoothed daily estimates, historically moving only a few tenths per week absent major news.
4. [sq1 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Silver Bulletin's July 16 note said Democrats should be expected to gain ground as more pollsters switch on likely-voter screens.
5. [sq1 | web_search | MODERATE cred 75 | DOWN | VERY_RECENT] A July 16 update noted the bluest July poll so far was Echelon at D+6, with other recent polls in the D+2 to D+5 range.
6. [sq3 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Emerson College (July 23, 2026) found Democrats leading 53%-42% (D+11) among likely 2026 voters, with Trump approval at 39%.
7. [sq1 | web_search | MODERATE cred 80 | DOWN | VERY_RECENT] RealClearPolling's late-July 2026 average showed Democrats 48.6% to Republicans 43.9%, about D+4.7.
8. [sq1 | web_search | MODERATE cred 82 | DOWN | RECENT] Morning Consult's weekly tracker has shown Democrats +3 to +4 consistently every week since spring 2026, at D+4 in early July.
9. [sq3 | web_search | MODERATE cred 78 | NEUTRAL | DATED] Decision Desk HQ's average showed Democrats +5 to +7 continuously since April 2026, around D+6 in June.
10. [sq3 | web_search | MODERATE cred 75 | UP | RECENT] The cycle high of D+7.0 was reached around May-June 2026, meaning the average has been within 0.7 points of that ceiling recently.
11. [sq4 | claude_news | WEAK cred 45 | NEUTRAL | VERY_RECENT] News searches surfaced no major national political or economic shock in mid-to-late July 2026 capable of moving the generic ballot by 2+ points.
12. [sq4 | web_search | MODERATE cred 80 | NEUTRAL | VERY_RECENT] Trump job approval has been stable at roughly 39% approve / 57% disapprove for the past two months per Emerson.

## Cross-Market Signals

### Polymarket
- "Will Trump meet with Netanyahu by August 31, 2026?" → Yes: 0.94, Volume: $141.6K

Information gaps:
  - No actual Silver Bulletin CSV daily values for late July / August 2026
  - No base rate for 30-day movement magnitude in Silver Bulletin-style averages (2018/2022 cycles)
  - Unknown methodology change timing for likely-voter screens in the SB model
  - No market/prediction data on this question

Key uncertainties:
  - Whether LV-screen transition systematically shifts the average up or down
  - Whether high-influence outliers (Emerson D+11) get weighted heavily
  - Volume/mix of August pollsters (Morning Consult/YouGov low vs Emerson/Quinnipiac high)
  - Possibility of an unforeseen August news shock
Raw forecast prompt
You are an elite superforecaster. Produce a probability distribution over the answer to this Metaculus numeric question.

## Question
What will Democrats' lead be in the congressional generic ballot on August 15, 2026?

## Description / Resolution Criteria
## Description
According to the [Silver Bulletin](https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls):

##### ***"Updated July 15, 2026***

***Democrats’ margin on the generic congressional ballot is currently sitting at D +6.3**. That’s up ever so slightly from D +6.1 over the past couple weeks, but still lower than the cycle high of D +7.*

*Most of the highest-influence polls in our average fall into two buckets. Some polls, such as those from* [*NBC News*](https://www.nbcnews.com/politics/2026-election/poll-democrats-maintain-edge-fight-congress-trump-gets-poor-marks-rcna348913)*,* [*Cygnal*](https://www.cygn.al/news/poll-independents-arent-who-you-think-they-are-the-left-americas-250-and-who-trump-has-lost-since-the-inauguration/)*, and* [*TIPP*](https://issuesinsights.com/2026/06/15/does-either-party-have-an-edge-in-2026-midterms-and-2028-presidential-election-ii-tipp-poll/) *have the national environment around D +5.* [*YouGov*](https://d3nkl3psvxxpe9.cloudfront.net/documents/econTabReport_1tbbxVr.pdf) *and* [*Morning Consult*](https://pro-assets.morningconsult.com/wp-uploads/2026/07/MCPI-Midterm-Ballot_260701.html) *are even more modest at D +3. On the other hand, polls from* [*Focaldata*](https://www.focaldata.com/blog/ossoffism-and-the-gops-elite-problem)*,* [*J.L. Partners*](https://www.dailymail.com/news/article-15945873/The-scorching-midterm-election-poll-shows-blue-wave-cresting-Republicans.html?ico=authors_pagination_desktop)*,* [*Quinnipiac*](https://poll.qu.edu/poll-release?releaseid=3961)*, and* [*Emerson*](https://emersoncollegepolling.com/june-2026/) *show things anywhere from D +7 to D +11. **-EMD, 7/6/26"***

`{"format": "metac_reveal_and_close_in_period", "info": {"post_id": 44682, "question_id": 44837}}`

## Resolution Criteria
This question resolves as the net support lead for Democrats shown at the Silver Bulletin's [Who’s ahead on the generic congressional ballot?](https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls) tracker for August 15, 2026, rounded to the nearest tenth, when accessed by Metaculus on or after August 16, 2026. 

## Fine Print
Between the value shown in the chart and the csv file under the chart ("Get the data"), the csv file takes precedence. See the "net" column in the csv.

***
This question's information (resolution criteria, fine print, background info, etc) is synced with an [original identical question](https://www.metaculus.com/questions/44682) which opened on 2026-07-17 09:00:00. This question will resolve based on the resolution criteria and fine print of the linked original question. However, if this question would resolve differently than the original question, then this question will be annulled. Additionally, if the original question's resolution could have been known before this question opened, then this question will be annulled.

## Range
The answer must be a number in [1.95, 10.05] (units: %).

## Sub-question decomposition (planner)
- (w=0.30) Will the Silver Bulletin generic ballot average on August 15, 2026 show a Democratic lead of MORE than 6.3 points (i.e., above the July 15, 2026 value)?  — Establishes whether the central tendency of the one-month drift is upward or downward from the anchor value; polling ave
- (w=0.40) Will the August 15, 2026 value fall inside the narrow band of D+5.3 to D+7.3 (i.e., within 1.0 point of the July 15 anchor)?  — Quantifies the typical 30-day volatility of a heavily-smoothed generic ballot average, which determines how tight the nu
- (w=0.20) Will the Democratic lead exceed the 2026 cycle high of D+7.0 at any point between July 15 and August 15, 2026?  — Tests for upside tail risk driven by news shocks (Trump approval slide, shutdown/economic events) that could break the a
- (w=0.10) Will there be a major national political or economic shock between mid-July and mid-August 2026 that visibly moves generic ballot polling by 2+ points?  — Captures fat-tail scenarios in either direction; absence of such a shock implies a very tight distribution around the an

## Synthesized evidence
1. [sq1 | web_search | STRONG cred 95 | NEUTRAL | RECENT] Silver Bulletin's July 15, 2026 value was D+6.3, up from D+6.1 over the prior two weeks, below the cycle high of D+7.
2. [sq2 | web_search | STRONG cred 85 | UP | RECENT] The tracker's full-cycle range since its Jan 22, 2026 launch (D+5.3) through July has been roughly D+5.3 to D+7.0, a ~1.7-point band over six months.
3. [sq2 | web_search | MODERATE cred 75 | UP | RECENT] Silver Bulletin averages are heavily smoothed daily estimates, historically moving only a few tenths per week absent major news.
4. [sq1 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Silver Bulletin's July 16 note said Democrats should be expected to gain ground as more pollsters switch on likely-voter screens.
5. [sq1 | web_search | MODERATE cred 75 | DOWN | VERY_RECENT] A July 16 update noted the bluest July poll so far was Echelon at D+6, with other recent polls in the D+2 to D+5 range.
6. [sq3 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Emerson College (July 23, 2026) found Democrats leading 53%-42% (D+11) among likely 2026 voters, with Trump approval at 39%.
7. [sq1 | web_search | MODERATE cred 80 | DOWN | VERY_RECENT] RealClearPolling's late-July 2026 average showed Democrats 48.6% to Republicans 43.9%, about D+4.7.
8. [sq1 | web_search | MODERATE cred 82 | DOWN | RECENT] Morning Consult's weekly tracker has shown Democrats +3 to +4 consistently every week since spring 2026, at D+4 in early July.
9. [sq3 | web_search | MODERATE cred 78 | NEUTRAL | DATED] Decision Desk HQ's average showed Democrats +5 to +7 continuously since April 2026, around D+6 in June.
10. [sq3 | web_search | MODERATE cred 75 | UP | RECENT] The cycle high of D+7.0 was reached around May-June 2026, meaning the average has been within 0.7 points of that ceiling recently.
11. [sq4 | claude_news | WEAK cred 45 | NEUTRAL | VERY_RECENT] News searches surfaced no major national political or economic shock in mid-to-late July 2026 capable of moving the generic ballot by 2+ points.
12. [sq4 | web_search | MODERATE cred 80 | NEUTRAL | VERY_RECENT] Trump job approval has been stable at roughly 39% approve / 57% disapprove for the past two months per Emerson.

## Cross-Market Signals

### Polymarket
- "Will Trump meet with Netanyahu by August 31, 2026?" → Yes: 0.94, Volume: $141.6K

Information gaps:
  - No actual Silver Bulletin CSV daily values for late July / August 2026
  - No base rate for 30-day movement magnitude in Silver Bulletin-style averages (2018/2022 cycles)
  - Unknown methodology change timing for likely-voter screens in the SB model
  - No market/prediction data on this question

Key uncertainties:
  - Whether LV-screen transition systematically shifts the average up or down
  - Whether high-influence outliers (Emerson D+11) get weighted heavily
  - Volume/mix of August pollsters (Morning Consult/YouGov low vs Emerson/Quinnipiac high)
  - Possibility of an unforeseen August news shock

## Required pre-forecast walkthrough

Before giving percentiles, address these explicitly in your rationale:
  (a) The time left until the question resolves.
  (b) The outcome if NOTHING changes from today (the status quo value).
  (c) The outcome if the CURRENT TREND continues.
  (d) The expectations of experts / markets / base rates.
  (e) A plausible scenario that produces a LOW outcome (near p10).
  (f) A plausible scenario that produces a HIGH outcome (near p90).

## Calibration guidance

- **Be humble about tails.** Good forecasters set WIDE 90/10 intervals to account for unknown unknowns. Narrow tails get punished by the log score far more than slightly-biased medians.
- **Status quo anchoring.** The p50 should be close to the status quo value unless you have strong evidence of a trend.
- Don't pile mass at one value — if you're tempted, widen the spread by 20-50%.
- **Anchor on markets/experts.** If liquid market prices, analyst forecasts, or community percentiles appear in the evidence, center your distribution on them and widen — don't override a liquid market without specific evidence it lacks.
- **Relative-return / spread questions ("how much will X's return exceed Y's").** A near-zero median is usually right, but size the TAILS to the more VOLATILE leg, not to a generic 2-3pp spread. Two broad equity indices (e.g. Nasdaq-100 vs S&P 500) do stay within roughly ±2-3pp over a two-week window. But when one leg is a commodity (crude oil, gold) or a single high-beta stock (e.g. Nvidia), the two-week realized spread regularly reaches ±10pp or more — crude-vs-equity spreads have hit ±18pp. In those cases set p10/p90 to at least ±10pp (±15pp or wider for oil) while keeping the median near the status-quo spread; the 2-3pp intuition applies only to index-vs-index.
- **Heavy-tailed one-off magnitudes (opening-weekend box office, product-launch or debut numbers).** Pre-event tracking for these routinely misses by ±40% or more, and results land both far above and far below the consensus. Do NOT treat the displayed [min, max] range as the plausible range or clamp p10/p90 to its edges: the outcome can fall outside the range in either direction (recent opening weekends resolved ~7% above a displayed ceiling in one case and roughly half the displayed floor in another). Set p10/p90 wide enough that a 2x-or-0.5x surprise versus your central estimate still lands inside the interval, and when concrete current tracking disagrees with historical/franchise base rates, weight the tracking.

## Output

Return ONLY valid JSON, no markdown fences:

{
  "rationale": "<address (a) through (f) above, then state your distribution — 6-10 sentences total>",
  "p10": <number>,
  "p25": <number>,
  "p50": <number>,
  "p75": <number>,
  "p90": <number>
}

Percentiles MUST be in non-decreasing order (p10 <= p25 <= p50 <= p75 <= p90).

Raw Trace JSON

Show full JSON
{
  "forecast": {
    "evidence_brief": "1. [sq1 | web_search | STRONG cred 95 | NEUTRAL | RECENT] Silver Bulletin\u0027s July 15, 2026 value was D+6.3, up from D+6.1 over the prior two weeks, below the cycle high of D+7.\n2. [sq2 | web_search | STRONG cred 85 | UP | RECENT] The tracker\u0027s full-cycle range since its Jan 22, 2026 launch (D+5.3) through July has been roughly D+5.3 to D+7.0, a ~1.7-point band over six months.\n3. [sq2 | web_search | MODERATE cred 75 | UP | RECENT] Silver Bulletin averages are heavily smoothed daily estimates, historically moving only a few tenths per week absent major news.\n4. [sq1 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Silver Bulletin\u0027s July 16 note said Democrats should be expected to gain ground as more pollsters switch on likely-voter screens.\n5. [sq1 | web_search | MODERATE cred 75 | DOWN | VERY_RECENT] A July 16 update noted the bluest July poll so far was Echelon at D+6, with other recent polls in the D+2 to D+5 range.\n6. [sq3 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Emerson College (July 23, 2026) found Democrats leading 53%-42% (D+11) among likely 2026 voters, with Trump approval at 39%.\n7. [sq1 | web_search | MODERATE cred 80 | DOWN | VERY_RECENT] RealClearPolling\u0027s late-July 2026 average showed Democrats 48.6% to Republicans 43.9%, about D+4.7.\n8. [sq1 | web_search | MODERATE cred 82 | DOWN | RECENT] Morning Consult\u0027s weekly tracker has shown Democrats +3 to +4 consistently every week since spring 2026, at D+4 in early July.\n9. [sq3 | web_search | MODERATE cred 78 | NEUTRAL | DATED] Decision Desk HQ\u0027s average showed Democrats +5 to +7 continuously since April 2026, around D+6 in June.\n10. [sq3 | web_search | MODERATE cred 75 | UP | RECENT] The cycle high of D+7.0 was reached around May-June 2026, meaning the average has been within 0.7 points of that ceiling recently.\n11. [sq4 | claude_news | WEAK cred 45 | NEUTRAL | VERY_RECENT] News searches surfaced no major national political or economic shock in mid-to-late July 2026 capable of moving the generic ballot by 2+ points.\n12. [sq4 | web_search | MODERATE cred 80 | NEUTRAL | VERY_RECENT] Trump job approval has been stable at roughly 39% approve / 57% disapprove for the past two months per Emerson.\n\n## Cross-Market Signals\n\n### Polymarket\n- \"Will Trump meet with Netanyahu by August 31, 2026?\" \u2192 Yes: 0.94, Volume: $141.6K\n\nInformation gaps:\n  - No actual Silver Bulletin CSV daily values for late July / August 2026\n  - No base rate for 30-day movement magnitude in Silver Bulletin-style averages (2018/2022 cycles)\n  - Unknown methodology change timing for likely-voter screens in the SB model\n  - No market/prediction data on this question\n\nKey uncertainties:\n  - Whether LV-screen transition systematically shifts the average up or down\n  - Whether high-influence outliers (Emerson D+11) get weighted heavily\n  - Volume/mix of August pollsters (Morning Consult/YouGov low vs Emerson/Quinnipiac high)\n  - Possibility of an unforeseen August news shock",
    "forecast_prompt": "You are an elite superforecaster. Produce a probability distribution over the answer to this Metaculus numeric question.\n\n## Question\nWhat will Democrats\u0027 lead be in the congressional generic ballot on August 15, 2026?\n\n## Description / Resolution Criteria\n## Description\nAccording to the [Silver Bulletin](https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls):\n\n##### ***\"Updated July 15, 2026***\n\n***Democrats\u2019 margin on the generic congressional ballot is currently sitting at D +6.3**. That\u2019s up ever so slightly from D +6.1 over the past couple weeks, but still lower than the cycle high of D +7.*\n\n*Most of the highest-influence polls in our average fall into two buckets. Some polls, such as those from*\u00a0[*NBC News*](https://www.nbcnews.com/politics/2026-election/poll-democrats-maintain-edge-fight-congress-trump-gets-poor-marks-rcna348913)*,*\u00a0[*Cygnal*](https://www.cygn.al/news/poll-independents-arent-who-you-think-they-are-the-left-americas-250-and-who-trump-has-lost-since-the-inauguration/)*, and*\u00a0[*TIPP*](https://issuesinsights.com/2026/06/15/does-either-party-have-an-edge-in-2026-midterms-and-2028-presidential-election-ii-tipp-poll/)\u00a0*have the national environment around D +5.*\u00a0[*YouGov*](https://d3nkl3psvxxpe9.cloudfront.net/documents/econTabReport_1tbbxVr.pdf)\u00a0*and*\u00a0[*Morning Consult*](https://pro-assets.morningconsult.com/wp-uploads/2026/07/MCPI-Midterm-Ballot_260701.html)\u00a0*are even more modest at D +3. On the other hand, polls from*\u00a0[*Focaldata*](https://www.focaldata.com/blog/ossoffism-and-the-gops-elite-problem)*,*\u00a0[*J.L. Partners*](https://www.dailymail.com/news/article-15945873/The-scorching-midterm-election-poll-shows-blue-wave-cresting-Republicans.html?ico=authors_pagination_desktop)*,*\u00a0[*Quinnipiac*](https://poll.qu.edu/poll-release?releaseid=3961)*, and*\u00a0[*Emerson*](https://emersoncollegepolling.com/june-2026/)\u00a0*show things anywhere from D +7 to D +11.\u00a0**-EMD, 7/6/26\"***\n\n`{\"format\": \"metac_reveal_and_close_in_period\", \"info\": {\"post_id\": 44682, \"question_id\": 44837}}`\n\n## Resolution Criteria\nThis question resolves as the net support lead for Democrats shown at the Silver Bulletin\u0027s [Who\u2019s ahead on the generic congressional ballot?](https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls) tracker for August 15, 2026, rounded to the nearest tenth, when accessed by Metaculus on or after August 16, 2026.\u0026#x20;\n\n## Fine Print\nBetween the value shown in the chart and the csv file under the chart (\"Get the data\"), the csv file takes precedence. See the \"net\" column in the csv.\n\n***\nThis question\u0027s information (resolution criteria, fine print, background info, etc) is synced with an [original identical question](https://www.metaculus.com/questions/44682) which opened on 2026-07-17 09:00:00. This question will resolve based on the resolution criteria and fine print of the linked original question. However, if this question would resolve differently than the original question, then this question will be annulled. Additionally, if the original question\u0027s resolution could have been known before this question opened, then this question will be annulled.\n\n## Range\nThe answer must be a number in [1.95, 10.05] (units: %).\n\n## Sub-question decomposition (planner)\n- (w=0.30) Will the Silver Bulletin generic ballot average on August 15, 2026 show a Democratic lead of MORE than 6.3 points (i.e., above the July 15, 2026 value)?  \u2014 Establishes whether the central tendency of the one-month drift is upward or downward from the anchor value; polling ave\n- (w=0.40) Will the August 15, 2026 value fall inside the narrow band of D+5.3 to D+7.3 (i.e., within 1.0 point of the July 15 anchor)?  \u2014 Quantifies the typical 30-day volatility of a heavily-smoothed generic ballot average, which determines how tight the nu\n- (w=0.20) Will the Democratic lead exceed the 2026 cycle high of D+7.0 at any point between July 15 and August 15, 2026?  \u2014 Tests for upside tail risk driven by news shocks (Trump approval slide, shutdown/economic events) that could break the a\n- (w=0.10) Will there be a major national political or economic shock between mid-July and mid-August 2026 that visibly moves generic ballot polling by 2+ points?  \u2014 Captures fat-tail scenarios in either direction; absence of such a shock implies a very tight distribution around the an\n\n## Synthesized evidence\n1. [sq1 | web_search | STRONG cred 95 | NEUTRAL | RECENT] Silver Bulletin\u0027s July 15, 2026 value was D+6.3, up from D+6.1 over the prior two weeks, below the cycle high of D+7.\n2. [sq2 | web_search | STRONG cred 85 | UP | RECENT] The tracker\u0027s full-cycle range since its Jan 22, 2026 launch (D+5.3) through July has been roughly D+5.3 to D+7.0, a ~1.7-point band over six months.\n3. [sq2 | web_search | MODERATE cred 75 | UP | RECENT] Silver Bulletin averages are heavily smoothed daily estimates, historically moving only a few tenths per week absent major news.\n4. [sq1 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Silver Bulletin\u0027s July 16 note said Democrats should be expected to gain ground as more pollsters switch on likely-voter screens.\n5. [sq1 | web_search | MODERATE cred 75 | DOWN | VERY_RECENT] A July 16 update noted the bluest July poll so far was Echelon at D+6, with other recent polls in the D+2 to D+5 range.\n6. [sq3 | web_search | MODERATE cred 80 | UP | VERY_RECENT] Emerson College (July 23, 2026) found Democrats leading 53%-42% (D+11) among likely 2026 voters, with Trump approval at 39%.\n7. [sq1 | web_search | MODERATE cred 80 | DOWN | VERY_RECENT] RealClearPolling\u0027s late-July 2026 average showed Democrats 48.6% to Republicans 43.9%, about D+4.7.\n8. [sq1 | web_search | MODERATE cred 82 | DOWN | RECENT] Morning Consult\u0027s weekly tracker has shown Democrats +3 to +4 consistently every week since spring 2026, at D+4 in early July.\n9. [sq3 | web_search | MODERATE cred 78 | NEUTRAL | DATED] Decision Desk HQ\u0027s average showed Democrats +5 to +7 continuously since April 2026, around D+6 in June.\n10. [sq3 | web_search | MODERATE cred 75 | UP | RECENT] The cycle high of D+7.0 was reached around May-June 2026, meaning the average has been within 0.7 points of that ceiling recently.\n11. [sq4 | claude_news | WEAK cred 45 | NEUTRAL | VERY_RECENT] News searches surfaced no major national political or economic shock in mid-to-late July 2026 capable of moving the generic ballot by 2+ points.\n12. [sq4 | web_search | MODERATE cred 80 | NEUTRAL | VERY_RECENT] Trump job approval has been stable at roughly 39% approve / 57% disapprove for the past two months per Emerson.\n\n## Cross-Market Signals\n\n### Polymarket\n- \"Will Trump meet with Netanyahu by August 31, 2026?\" \u2192 Yes: 0.94, Volume: $141.6K\n\nInformation gaps:\n  - No actual Silver Bulletin CSV daily values for late July / August 2026\n  - No base rate for 30-day movement magnitude in Silver Bulletin-style averages (2018/2022 cycles)\n  - Unknown methodology change timing for likely-voter screens in the SB model\n  - No market/prediction data on this question\n\nKey uncertainties:\n  - Whether LV-screen transition systematically shifts the average up or down\n  - Whether high-influence outliers (Emerson D+11) get weighted heavily\n  - Volume/mix of August pollsters (Morning Consult/YouGov low vs Emerson/Quinnipiac high)\n  - Possibility of an unforeseen August news shock\n\n## Required pre-forecast walkthrough\n\nBefore giving percentiles, address these explicitly in your rationale:\n  (a) The time left until the question resolves.\n  (b) The outcome if NOTHING changes from today (the status quo value).\n  (c) The outcome if the CURRENT TREND continues.\n  (d) The expectations of experts / markets / base rates.\n  (e) A plausible scenario that produces a LOW outcome (near p10).\n  (f) A plausible scenario that produces a HIGH outcome (near p90).\n\n## Calibration guidance\n\n- **Be humble about tails.** Good forecasters set WIDE 90/10 intervals to account for unknown unknowns. Narrow tails get punished by the log score far more than slightly-biased medians.\n- **Status quo anchoring.** The p50 should be close to the status quo value unless you have strong evidence of a trend.\n- Don\u0027t pile mass at one value \u2014 if you\u0027re tempted, widen the spread by 20-50%.\n- **Anchor on markets/experts.** If liquid market prices, analyst forecasts, or community percentiles appear in the evidence, center your distribution on them and widen \u2014 don\u0027t override a liquid market without specific evidence it lacks.\n- **Relative-return / spread questions (\"how much will X\u0027s return exceed Y\u0027s\").** A near-zero median is usually right, but size the TAILS to the more VOLATILE leg, not to a generic 2-3pp spread. Two broad equity indices (e.g. Nasdaq-100 vs S\u0026P 500) do stay within roughly \u00b12-3pp over a two-week window. But when one leg is a commodity (crude oil, gold) or a single high-beta stock (e.g. Nvidia), the two-week realized spread regularly reaches \u00b110pp or more \u2014 crude-vs-equity spreads have hit \u00b118pp. In those cases set p10/p90 to at least \u00b110pp (\u00b115pp or wider for oil) while keeping the median near the status-quo spread; the 2-3pp intuition applies only to index-vs-index.\n- **Heavy-tailed one-off magnitudes (opening-weekend box office, product-launch or debut numbers).** Pre-event tracking for these routinely misses by \u00b140% or more, and results land both far above and far below the consensus. Do NOT treat the displayed [min, max] range as the plausible range or clamp p10/p90 to its edges: the outcome can fall outside the range in either direction (recent opening weekends resolved ~7% above a displayed ceiling in one case and roughly half the displayed floor in another). Set p10/p90 wide enough that a 2x-or-0.5x surprise versus your central estimate still lands inside the interval, and when concrete current tracking disagrees with historical/franchise base rates, weight the tracking.\n\n## Output\n\nReturn ONLY valid JSON, no markdown fences:\n\n{\n  \"rationale\": \"\u003caddress (a) through (f) above, then state your distribution \u2014 6-10 sentences total\u003e\",\n  \"p10\": \u003cnumber\u003e,\n  \"p25\": \u003cnumber\u003e,\n  \"p50\": \u003cnumber\u003e,\n  \"p75\": \u003cnumber\u003e,\n  \"p90\": \u003cnumber\u003e\n}\n\nPercentiles MUST be in non-decreasing order (p10 \u003c= p25 \u003c= p50 \u003c= p75 \u003c= p90).\n",
    "models": [
      "opus"
    ],
    "p50": 6.4,
    "percentiles": {
      "0.1": 5.25,
      "0.25": 5.9,
      "0.5": 6.4,
      "0.75": 6.9,
      "0.9": 7.6
    },
    "rationale": "(a) The anchor is the July 15, 2026 value of D+6.3, and resolution is one month later on August 15 \u2014 a short horizon for a heavily smoothed daily average. (b) Status quo: if nothing changes, the value stays near D+6.3, since Silver Bulletin averages typically move only a few tenths per week absent major news. (c) Current trend: the average ticked up from D+6.1 to D+6.3 over two weeks, and Silver himself flagged that Democrats should gain as pollsters switch to likely-voter screens; Emerson\u0027s late-July D+11 among LVs and continued sub-40% Trump approval push slightly upward, while Morning Consult (D+3/4), YouGov (D+3), and an RCP average near D+4.7 pull down \u2014 net a mild upward tilt to roughly D+6.4\u20136.6. (d) Base rates: the full-cycle range since January has been about D+5.3 to D+7.0, a 1.7-point band over six months, implying 30-day moves are usually well under 1 point; no market data exists, and no shock appeared in July news. (e) LOW scenario (~p10): August is dominated by low-margin trackers (Morning Consult, YouGov, Echelon, Cygnal, TIPP) plus a modest GOP news cycle or economic good news, dragging the average toward D+5.0\u20135.4. (f) HIGH scenario (~p90): more pollsters adopt LV screens with pro-Democratic shifts, high-influence houses (Emerson, Quinnipiac, Focaldata, J.L. Partners) publish D+8 to D+11, and a new Trump-approval slide pushes the average to a new cycle high of D+7.3\u20137.6. I center just above the anchor at D+6.4 with roughly \u00b11 point at the quartiles and wider tails to accommodate a methodology-driven regime shift or an unforeseen August shock."
  },
  "plan": {
    "combination_logic": "weighted_average",
    "domain": "politics",
    "n_sub_qs": 4,
    "n_tools": 3,
    "reasoning_approach": "",
    "sub_questions": [
      {
        "id": "sq1",
        "question": "Will the Silver Bulletin generic ballot average on August 15, 2026 show a Democratic lead of MORE than 6.3 points (i.e., above the July 15, 2026 value)?",
        "rationale": "Establishes whether the central tendency of the one-month drift is upward or downward from the anchor value; polling averages are highly autocorrelated so the anchor dominates.",
        "weight": 0.3
      },
      {
        "id": "sq2",
        "question": "Will the August 15, 2026 value fall inside the narrow band of D+5.3 to D+7.3 (i.e., within 1.0 point of the July 15 anchor)?",
        "rationale": "Quantifies the typical 30-day volatility of a heavily-smoothed generic ballot average, which determines how tight the numeric distribution should be around the anchor.",
        "weight": 0.4
      },
      {
        "id": "sq3",
        "question": "Will the Democratic lead exceed the 2026 cycle high of D+7.0 at any point between July 15 and August 15, 2026?",
        "rationale": "Tests for upside tail risk driven by news shocks (Trump approval slide, shutdown/economic events) that could break the average out of its recent range.",
        "weight": 0.2
      },
      {
        "id": "sq4",
        "question": "Will there be a major national political or economic shock between mid-July and mid-August 2026 that visibly moves generic ballot polling by 2+ points?",
        "rationale": "Captures fat-tail scenarios in either direction; absence of such a shock implies a very tight distribution around the anchor.",
        "weight": 0.1
      }
    ],
    "tool_requests": [
      {
        "parameters": {
          "queries": [
            "Silver Bulletin generic ballot average August 2026 Democrats lead",
            "generic congressional ballot poll August 2026 Democrats Republicans margin",
            "Nate Silver generic ballot tracker 2026 update"
          ]
        },
        "target_sub_questions": [
          "sq1",
          "sq2",
          "sq3"
        ],
        "tool_name": "web_search"
      },
      {
        "parameters": {
          "brief": "Find the most recent value of the Silver Bulletin 2026 generic congressional ballot average (net Democratic margin), its trend over the past 2-3 months, recent individual generic ballot polls (YouGov/Economist, Morning Consult, Quinnipiac, Emerson, NBC, Cygnal, Focaldata, J.L. Partners), and any major political events in July-August 2026 (Trump approval, shutdown, economy, scandals) that could shift the national environment.",
          "max_searches": 4,
          "question_title": "What will Democrats\u0027 lead be in the congressional generic ballot on August 15, 2026?"
        },
        "target_sub_questions": [
          "sq1",
          "sq3",
          "sq4"
        ],
        "tool_name": "claude_news"
      },
      {
        "parameters": {
          "code": "import numpy as np\nnp.random.seed(0)\nanchor = 6.3\ncycle_mean = 6.0\nfor sd in [0.6,0.8,1.0]:\n    for kappa in [0.0,0.15,0.3]:\n        pass\n"
        },
        "target_sub_questions": [
          "sq1",
          "sq2",
          "sq3"
        ],
        "tool_name": "code_execution"
      }
    ]
  },
  "question": {
    "close_time": "2026-07-25T09:00:00Z",
    "description": "## Description\nAccording to the [Silver Bulletin](https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls):\n\n##### ***\"Updated July 15, 2026***\n\n***Democrats\u2019 margin on the generic congressional ballot is currently sitting at D +6.3**. That\u2019s up ever so slightly from D +6.1 over the past couple weeks, but still lower than the cycle high of D +7.*\n\n*Most of the highest-influence polls in our average fall into two buckets. Some polls, such as those from*\u00a0[*NBC News*](https://www.nbcnews.com/politics/2026-election/poll-democrats-maintain-edge-fight-congress-trump-gets-poor-marks-rcna348913)*,*\u00a0[*Cygnal*](https://www.cygn.al/news/poll-independents-arent-who-you-think-they-are-the-left-americas-250-and-who-trump-has-lost-since-the-inauguration/)*, and*\u00a0[*TIPP*](https://issuesinsights.com/2026/06/15/does-either-party-have-an-edge-in-2026-midterms-and-2028-presidential-election-ii-tipp-poll/)\u00a0*have the national environment around D +5.*\u00a0[*YouGov*](https://d3nkl3psvxxpe9.cloudfront.net/documents/econTabReport_1tbbxVr.pdf)\u00a0*and*\u00a0[*Morning Consult*](https://pro-assets.morningconsult.com/wp-uploads/2026/07/MCPI-Midterm-Ballot_260701.html)\u00a0*are even more modest at D +3. On the other hand, polls from*\u00a0[*Focaldata*](https://www.focaldata.com/blog/ossoffism-and-the-gops-elite-problem)*,*\u00a0[*J.L. Partners*](https://www.dailymail.com/news/article-15945873/The-scorching-midterm-election-poll-shows-blue-wave-cresting-Republicans.html?ico=authors_pagination_desktop)*,*\u00a0[*Quinnipiac*](https://poll.qu.edu/poll-release?releaseid=3961)*, and*\u00a0[*Emerson*](https://emersoncollegepolling.com/june-2026/)\u00a0*show things anywhere from D +7 to D +11.\u00a0**-EMD, 7/6/26\"***\n\n`{\"format\": \"metac_reveal_and_close_in_period\", \"info\": {\"post_id\": 44682, \"question_id\": 44837}}`\n\n## Resolution Criteria\nThis question resolves as the net support lead for Democrats shown at the Silver Bulletin\u0027s [Who\u2019s ahead on the generic congressional ballot?](https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls) tracker for August 15, 2026, rounded to the nearest tenth, when accessed by Metaculus on or after August 16, 2026.\u0026#x20;\n\n## Fine Print\nBetween the value shown in the chart and the csv file under the chart (\"Get the data\"), the csv file takes precedence. See the \"net\" column in the csv.\n\n***\nThis question\u0027s information (resolution criteria, fine print, background info, etc) is synced with an [original identical question](https://www.metaculus.com/questions/44682) which opened on 2026-07-17 09:00:00. This question will resolve based on the resolution criteria and fine print of the linked original question. However, if this question would resolve differently than the original question, then this question will be annulled. Additionally, if the original question\u0027s resolution could have been known before this question opened, then this question will be annulled.",
    "open_lower": true,
    "open_upper": true,
    "q_max": 10.05,
    "q_min": 1.95,
    "question_type": "numeric",
    "title": "What will Democrats\u0027 lead be in the congressional generic ballot on August 15, 2026?",
    "units": "%"
  },
  "research": {
    "cross_market_brief": "## Cross-Market Signals\n\n### Polymarket\n- \"Will Trump meet with Netanyahu by August 31, 2026?\" \u2192 Yes: 0.94, Volume: $141.6K",
    "errors": [],
    "has_cross_market": true,
    "n_errors": 0,
    "n_tools": 3,
    "tools": [
      {
        "elapsed_s": 25.16,
        "error": null,
        "success": true,
        "summary": "0 results",
        "tool_name": "web_search"
      },
      {
        "elapsed_s": 21.06,
        "error": null,
        "success": true,
        "summary": "14 citations",
        "tool_name": "claude_news"
      },
      {
        "elapsed_s": 0.08,
        "error": null,
        "success": true,
        "summary": "code",
        "tool_name": "code_execution"
      }
    ]
  },
  "synthesis": {
    "evidence": [
      {
        "claim": "Silver Bulletin\u0027s July 15, 2026 value was D+6.3, up from D+6.1 over the prior two weeks, below the cycle high of D+7.",
        "credibility": 95,
        "direction": "NEUTRAL",
        "priced_in": true,
        "recency": "RECENT",
        "source": "web_search",
        "strength": "STRONG",
        "sub_question_id": "sq1"
      },
      {
        "claim": "The tracker\u0027s full-cycle range since its Jan 22, 2026 launch (D+5.3) through July has been roughly D+5.3 to D+7.0, a ~1.7-point band over six months.",
        "credibility": 85,
        "direction": "UP",
        "priced_in": true,
        "recency": "RECENT",
        "source": "web_search",
        "strength": "STRONG",
        "sub_question_id": "sq2"
      },
      {
        "claim": "Silver Bulletin averages are heavily smoothed daily estimates, historically moving only a few tenths per week absent major news.",
        "credibility": 75,
        "direction": "UP",
        "priced_in": true,
        "recency": "RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq2"
      },
      {
        "claim": "Silver Bulletin\u0027s July 16 note said Democrats should be expected to gain ground as more pollsters switch on likely-voter screens.",
        "credibility": 80,
        "direction": "UP",
        "priced_in": false,
        "recency": "VERY_RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq1"
      },
      {
        "claim": "A July 16 update noted the bluest July poll so far was Echelon at D+6, with other recent polls in the D+2 to D+5 range.",
        "credibility": 75,
        "direction": "DOWN",
        "priced_in": false,
        "recency": "VERY_RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq1"
      },
      {
        "claim": "Emerson College (July 23, 2026) found Democrats leading 53%-42% (D+11) among likely 2026 voters, with Trump approval at 39%.",
        "credibility": 80,
        "direction": "UP",
        "priced_in": false,
        "recency": "VERY_RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq3"
      },
      {
        "claim": "RealClearPolling\u0027s late-July 2026 average showed Democrats 48.6% to Republicans 43.9%, about D+4.7.",
        "credibility": 80,
        "direction": "DOWN",
        "priced_in": true,
        "recency": "VERY_RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq1"
      },
      {
        "claim": "Morning Consult\u0027s weekly tracker has shown Democrats +3 to +4 consistently every week since spring 2026, at D+4 in early July.",
        "credibility": 82,
        "direction": "DOWN",
        "priced_in": true,
        "recency": "RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq1"
      },
      {
        "claim": "Decision Desk HQ\u0027s average showed Democrats +5 to +7 continuously since April 2026, around D+6 in June.",
        "credibility": 78,
        "direction": "NEUTRAL",
        "priced_in": true,
        "recency": "DATED",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq3"
      },
      {
        "claim": "The cycle high of D+7.0 was reached around May-June 2026, meaning the average has been within 0.7 points of that ceiling recently.",
        "credibility": 75,
        "direction": "UP",
        "priced_in": true,
        "recency": "RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq3"
      },
      {
        "claim": "News searches surfaced no major national political or economic shock in mid-to-late July 2026 capable of moving the generic ballot by 2+ points.",
        "credibility": 45,
        "direction": "NEUTRAL",
        "priced_in": true,
        "recency": "VERY_RECENT",
        "source": "claude_news",
        "strength": "WEAK",
        "sub_question_id": "sq4"
      },
      {
        "claim": "Trump job approval has been stable at roughly 39% approve / 57% disapprove for the past two months per Emerson.",
        "credibility": 80,
        "direction": "NEUTRAL",
        "priced_in": true,
        "recency": "VERY_RECENT",
        "source": "web_search",
        "strength": "MODERATE",
        "sub_question_id": "sq4"
      }
    ],
    "information_gaps": [
      "No actual Silver Bulletin CSV daily values for late July / August 2026",
      "No base rate for 30-day movement magnitude in Silver Bulletin-style averages (2018/2022 cycles)",
      "Unknown methodology change timing for likely-voter screens in the SB model",
      "No market/prediction data on this question"
    ],
    "key_uncertainties": [
      "Whether LV-screen transition systematically shifts the average up or down",
      "Whether high-influence outliers (Emerson D+11) get weighted heavily",
      "Volume/mix of August pollsters (Morning Consult/YouGov low vs Emerson/Quinnipiac high)",
      "Possibility of an unforeseen August news shock"
    ],
    "n_evidence": 12
  },
  "timings": {
    "forecast": 13.16,
    "plan": 30.46,
    "research": 25.16,
    "synthesis": 26.79
  }
}