Anchor on the June 29 WaPo snapshot (near-tie between Andreessen/Horowitz and Musk, with Yass close), then update with any July/August FEC-filing news of large new contributions found via news search; the simulation provides a base rate for rank-flip probability given lumpy giving, and the sub-question probabilities are blended by weighted average into the multiple-choice option probabilities.
## Cross-Market Signals ### Polymarket - "Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.00, Volume: $5.3M - "Will there be no change in Fed interest rates after the September 2026 meeting?" → Yes: 0.74, Volume: $7.7M - "Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.01, Volume: $8.6M - "Will the Fed increase interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.24, Volume: $7.1M - "Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.00, Volume: $4.6M - "US announces end of Iranian blockade by September 30, 2026?" → Yes: 0.39, Volume: $653.0K - "Will Shakhtar Donetsk win the 2026-27 UEFA Champions League Championship?" → Yes: 0.00, Volume: $5.2M - "Will Bitcoin reach $1,000,000 by December 31, 2026?" → Yes: 0.01, Volume: $2.4M - "US announces end of Iranian blockade by August 15, 2026?" → Yes: 0.01, Volume: $3.0M - "Will 2 Fed rate cuts happen in 2026?" → Yes: 0.04, Volume: $2.7M
1. [sq1 | web_search | STRONG cred 80 | UP | DATED] WaPo leaderboard updated July 21, 2026 (data through July 20) still shows Horowitz & Andreessen first among Republicans at $91.3M. 2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | DATED] The July 21 update lists identical dollar figures ($91.3M/$90.6M/$89.3M) to the June 29 snapshot, suggesting possibly stale or unchanged top-three totals. 3. [sq2 | web_search | STRONG cred 85 | UP | DATED] Musk trailed Andreessen/Horowitz by only $0.7M ($90.6M vs $91.3M) in the latest reported WaPo figures, a gap under 1%. 4. [sq2 | web_search | MODERATE cred 75 | UP | DATED] In late June Musk gave $5M each to House and Senate GOP leadership super PACs plus $5M to Trump's PAC. 5. [sq2 | web_search | MODERATE cred 70 | UP | RECENT] The Hill reported (~early August 2026) that Musk plans a big political ad buy across eight states. 6. [sq2 | article_search | MODERATE cred 85 | UP | DATED] Musk became the world's first trillionaire after the SpaceX IPO in June 2026, giving him effectively unconstrained donation capacity. 7. [sq2 | web_search | MODERATE cred 80 | DOWN | DATED] Direct independent expenditures are excluded from WaPo's methodology, so Musk ad buys made outside committee contributions would not count toward his total. 8. [sq3 | web_search | MODERATE cred 75 | NEUTRAL | DATED] Jeff & Janine Yass were third among Republicans at $89.3M, $2M behind the leader, with no reported July/August contributions found. 9. [sq4 | web_search | WEAK cred 60 | UP | DATED] One Nation, a Republican-aligned nonprofit at $70.7M, appears on the leaderboard alongside individuals, creating ambiguity about non-individual entrants. 10. [sq4 | web_search | MODERATE cred 80 | DOWN | DATED] Uihlein ($69.5M) and Adelson ($67.6M) trail the leader by ~$22-24M, a large gap to close in two months. 11. [sq4 | article_search | MODERATE cred 88 | NEUTRAL | DATED] A June 30 Supreme Court ruling erased party-candidate coordination limits, expected to inject substantially more money into GOP-aligned committees ahead of November. 12. [sq1 | code_execution | WEAK cred 35 | NEUTRAL | VERY_RECENT] Monte Carlo of lumpy super PAC giving from the June baselines yields Musk 30%, Yass 28%, Andreessen/Horowitz 22%, Adelson 10%, other 6%, Uihlein 3%. ## Cross-Market Signals ### Polymarket - "Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.00, Volume: $5.3M - "Will there be no change in Fed interest rates after the September 2026 meeting?" → Yes: 0.74, Volume: $7.7M - "Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.01, Volume: $8.6M - "Will the Fed increase interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.24, Volume: $7.1M - "Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.00, Volume: $4.6M - "US announces end of Iranian blockade by September 30, 2026?" → Yes: 0.39, Volume: $653.0K - "Will Shakhtar Donetsk win the 2026-27 UEFA Champions League Championship?" → Yes: 0.00, Volume: $5.2M - "Will Bitcoin reach $1,000,000 by December 31, 2026?" → Yes: 0.01, Volume: $2.4M - "US announces end of Iranian blockade by August 15, 2026?" → Yes: 0.01, Volume: $3.0M - "Will 2 Fed rate cuts happen in 2026?" → Yes: 0.04, Volume: $2.7M Information gaps: - No July/August 2026 FEC filing news on Yass or Andreessen/Horowitz contributions - Unknown whether WaPo will refresh the leaderboard between Aug 20 filings and Sept 1 - No historical base rate for how often the top-donor rank flips over a two-month window - Unclear whether WaPo counts organizations (e.g., One Nation) as eligible 'donors' Key uncertainties: - Whether Musk makes a single large committee contribution before Aug 20 filings - Whether the July 21 figures were genuinely updated or stale - Timing lag between contributions and FEC reporting captured by WaPo - Possible new mega-entrant (e.g., crypto or AI-industry individual donors)
You are an elite superforecaster. Estimate the probability of each option for this Metaculus multiple-choice question.
## Question
Who will be the largest Republican donor in the 2026 cycle, as of September 1, 2026?
## Description / Resolution Criteria
## Description
The Washington Post, [Meet the megadonors pouring more than \$1.3 billion into the 2026 election](https://www.washingtonpost.com/elections/interactive/2026/06/25/these-are-biggest-individual-donors-2026-election-cycle/): 
> The top donors in American politics have poured more than \$1.3 billion so far this cycle into influencing the country’s politics, according to a Washington Post analysis of Federal Election Commission data.
> The donors lean Republican, and cash could prove critical for the GOP to maintain control of Congress in November. In the first half of 2026, Republican-leaning donors gave \$880 million, compared with \$290 million from Democratic-leaning givers and \$200 million from bipartisan and special interest groups.
> But most of the money, regardless of affiliation, was given to super PACs that can legally accept unlimited sums.
According to the Post, as of June 29, 2026 the highest Republican donors were: 
1. Ben Horowitz & Marc Andreessen: \$91.3 million
2. Elon Musk: \$90.6 million
3. Jeff & Janine Yass: \$89.3 million
4. Elizabeth & Richard Uihlein: \$69.5 million
5. Miriam Adelson: \$67.6 million
`{"format": "metac_reveal_and_close_in_period", "info": {"post_id": 45016, "question_id": 45169}}`
## Resolution Criteria
This question resolves as the Republican-aligned donor, according to the Washington Post at its Top 50 donors [leaderboard](https://www.washingtonpost.com/elections/interactive/2026/06/25/these-are-biggest-individual-donors-2026-election-cycle/), who has donated the highest amount in the 2026 election cycle, as of September 1, 2026.
## Fine Print
If someone else is the top donor or in the event of a tie, the question resolves as **Other**. 
***
This question's information (resolution criteria, fine print, background info, etc) is synced with an [original identical question](https://www.metaculus.com/questions/45016) which opened on 2026-08-03 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.
## Options
- Ben Horowitz & Marc Andreessen
- Elon Musk
- Jeff & Janine Yass
- Elizabeth & Richard Uihlein
- Miriam Adelson
- Other
## Sub-question decomposition (planner)
- (w=0.30) Will Ben Horowitz & Marc Andreessen be listed as the top Republican-aligned donor on the Washington Post Top 50 donors leaderboard as of September 1, 2026? — They led the June 29 snapshot ($91.3M), so incumbency at the top is the base case unless newer FEC filings shift the ran
- (w=0.30) Will Elon Musk be listed as the top Republican-aligned donor on the WaPo leaderboard as of September 1, 2026? — Musk was within $0.7M of the lead and has the largest capacity/history of massive late super PAC infusions; any new Amer
- (w=0.20) Will Jeff & Janine Yass be listed as the top Republican-aligned donor on the WaPo leaderboard as of September 1, 2026? — Yass was $2M off the lead and is a consistently high-volume, steady giver to Club for Growth-aligned and school-choice P
- (w=0.20) Will the top Republican-aligned donor as of September 1, 2026 be someone other than Horowitz/Andreessen, Musk, or Yass (e.g., Uihlein, Adelson, or a new entrant), or will the leaderboard be tied/not updated in a way that forces 'Other'? — Uihlein ($69.5M) and Adelson ($67.6M) are within ~$25M and often make single very large late-cycle contributions; also c
## Synthesized evidence
1. [sq1 | web_search | STRONG cred 80 | UP | DATED] WaPo leaderboard updated July 21, 2026 (data through July 20) still shows Horowitz & Andreessen first among Republicans at $91.3M.
2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | DATED] The July 21 update lists identical dollar figures ($91.3M/$90.6M/$89.3M) to the June 29 snapshot, suggesting possibly stale or unchanged top-three totals.
3. [sq2 | web_search | STRONG cred 85 | UP | DATED] Musk trailed Andreessen/Horowitz by only $0.7M ($90.6M vs $91.3M) in the latest reported WaPo figures, a gap under 1%.
4. [sq2 | web_search | MODERATE cred 75 | UP | DATED] In late June Musk gave $5M each to House and Senate GOP leadership super PACs plus $5M to Trump's PAC.
5. [sq2 | web_search | MODERATE cred 70 | UP | RECENT] The Hill reported (~early August 2026) that Musk plans a big political ad buy across eight states.
6. [sq2 | article_search | MODERATE cred 85 | UP | DATED] Musk became the world's first trillionaire after the SpaceX IPO in June 2026, giving him effectively unconstrained donation capacity.
7. [sq2 | web_search | MODERATE cred 80 | DOWN | DATED] Direct independent expenditures are excluded from WaPo's methodology, so Musk ad buys made outside committee contributions would not count toward his total.
8. [sq3 | web_search | MODERATE cred 75 | NEUTRAL | DATED] Jeff & Janine Yass were third among Republicans at $89.3M, $2M behind the leader, with no reported July/August contributions found.
9. [sq4 | web_search | WEAK cred 60 | UP | DATED] One Nation, a Republican-aligned nonprofit at $70.7M, appears on the leaderboard alongside individuals, creating ambiguity about non-individual entrants.
10. [sq4 | web_search | MODERATE cred 80 | DOWN | DATED] Uihlein ($69.5M) and Adelson ($67.6M) trail the leader by ~$22-24M, a large gap to close in two months.
11. [sq4 | article_search | MODERATE cred 88 | NEUTRAL | DATED] A June 30 Supreme Court ruling erased party-candidate coordination limits, expected to inject substantially more money into GOP-aligned committees ahead of November.
12. [sq1 | code_execution | WEAK cred 35 | NEUTRAL | VERY_RECENT] Monte Carlo of lumpy super PAC giving from the June baselines yields Musk 30%, Yass 28%, Andreessen/Horowitz 22%, Adelson 10%, other 6%, Uihlein 3%.
## Cross-Market Signals
### Polymarket
- "Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.00, Volume: $5.3M
- "Will there be no change in Fed interest rates after the September 2026 meeting?" → Yes: 0.74, Volume: $7.7M
- "Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.01, Volume: $8.6M
- "Will the Fed increase interest rates by 25 bps after the September 2026 meeting?" → Yes: 0.24, Volume: $7.1M
- "Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?" → Yes: 0.00, Volume: $4.6M
- "US announces end of Iranian blockade by September 30, 2026?" → Yes: 0.39, Volume: $653.0K
- "Will Shakhtar Donetsk win the 2026-27 UEFA Champions League Championship?" → Yes: 0.00, Volume: $5.2M
- "Will Bitcoin reach $1,000,000 by December 31, 2026?" → Yes: 0.01, Volume: $2.4M
- "US announces end of Iranian blockade by August 15, 2026?" → Yes: 0.01, Volume: $3.0M
- "Will 2 Fed rate cuts happen in 2026?" → Yes: 0.04, Volume: $2.7M
Information gaps:
- No July/August 2026 FEC filing news on Yass or Andreessen/Horowitz contributions
- Unknown whether WaPo will refresh the leaderboard between Aug 20 filings and Sept 1
- No historical base rate for how often the top-donor rank flips over a two-month window
- Unclear whether WaPo counts organizations (e.g., One Nation) as eligible 'donors'
Key uncertainties:
- Whether Musk makes a single large committee contribution before Aug 20 filings
- Whether the July 21 figures were genuinely updated or stale
- Timing lag between contributions and FEC reporting captured by WaPo
- Possible new mega-entrant (e.g., crypto or AI-industry individual donors)
## Required pre-forecast walkthrough
Before giving probabilities, address these explicitly in your rationale:
(a) The time left until the question resolves.
(b) The status quo outcome — the option most likely if nothing changes from today.
(c) An outcome that would be SURPRISING but plausible.
## Calibration guidance
- **Status quo anchoring.** Good forecasters put extra weight on the status quo option because the world changes slowly most of the time.
- **Leave moderate probability on most options.** Good forecasters don't drop options to ~0% — leave ≥3-5% on every option to account for unexpected outcomes, unless you have strong specific evidence ruling them out.
- Avoid uniform-distribution laziness — most options are not equally likely.
- **Anchor on prediction markets.** If liquid market prices (Polymarket / Kalshi) for these options appear in the evidence, treat them as a strong prior and stay close to them absent specific contrary evidence.
## Output
Return ONLY valid JSON, no markdown fences:
{
"rationale": "<address (a) (b) (c) above, then explain your distribution — 4-7 sentences total>",
"probabilities": {
"Ben Horowitz & Marc Andreessen": <prob>,
"Elon Musk": <prob>,
"Jeff & Janine Yass": <prob>,
"Elizabeth & Richard Uihlein": <prob>,
"Miriam Adelson": <prob>,
"Other": <prob>
}
}
Probabilities MUST sum to ~1.0 (renormalization is applied; close enough is fine).
{
"forecast": {
"evidence_brief": "1. [sq1 | web_search | STRONG cred 80 | UP | DATED] WaPo leaderboard updated July 21, 2026 (data through July 20) still shows Horowitz \u0026 Andreessen first among Republicans at $91.3M.\n2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | DATED] The July 21 update lists identical dollar figures ($91.3M/$90.6M/$89.3M) to the June 29 snapshot, suggesting possibly stale or unchanged top-three totals.\n3. [sq2 | web_search | STRONG cred 85 | UP | DATED] Musk trailed Andreessen/Horowitz by only $0.7M ($90.6M vs $91.3M) in the latest reported WaPo figures, a gap under 1%.\n4. [sq2 | web_search | MODERATE cred 75 | UP | DATED] In late June Musk gave $5M each to House and Senate GOP leadership super PACs plus $5M to Trump\u0027s PAC.\n5. [sq2 | web_search | MODERATE cred 70 | UP | RECENT] The Hill reported (~early August 2026) that Musk plans a big political ad buy across eight states.\n6. [sq2 | article_search | MODERATE cred 85 | UP | DATED] Musk became the world\u0027s first trillionaire after the SpaceX IPO in June 2026, giving him effectively unconstrained donation capacity.\n7. [sq2 | web_search | MODERATE cred 80 | DOWN | DATED] Direct independent expenditures are excluded from WaPo\u0027s methodology, so Musk ad buys made outside committee contributions would not count toward his total.\n8. [sq3 | web_search | MODERATE cred 75 | NEUTRAL | DATED] Jeff \u0026 Janine Yass were third among Republicans at $89.3M, $2M behind the leader, with no reported July/August contributions found.\n9. [sq4 | web_search | WEAK cred 60 | UP | DATED] One Nation, a Republican-aligned nonprofit at $70.7M, appears on the leaderboard alongside individuals, creating ambiguity about non-individual entrants.\n10. [sq4 | web_search | MODERATE cred 80 | DOWN | DATED] Uihlein ($69.5M) and Adelson ($67.6M) trail the leader by ~$22-24M, a large gap to close in two months.\n11. [sq4 | article_search | MODERATE cred 88 | NEUTRAL | DATED] A June 30 Supreme Court ruling erased party-candidate coordination limits, expected to inject substantially more money into GOP-aligned committees ahead of November.\n12. [sq1 | code_execution | WEAK cred 35 | NEUTRAL | VERY_RECENT] Monte Carlo of lumpy super PAC giving from the June baselines yields Musk 30%, Yass 28%, Andreessen/Horowitz 22%, Adelson 10%, other 6%, Uihlein 3%.\n\n## Cross-Market Signals\n\n### Polymarket\n- \"Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.00, Volume: $5.3M\n- \"Will there be no change in Fed interest rates after the September 2026 meeting?\" \u2192 Yes: 0.74, Volume: $7.7M\n- \"Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.01, Volume: $8.6M\n- \"Will the Fed increase interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.24, Volume: $7.1M\n- \"Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.00, Volume: $4.6M\n- \"US announces end of Iranian blockade by September 30, 2026?\" \u2192 Yes: 0.39, Volume: $653.0K\n- \"Will Shakhtar Donetsk win the 2026-27 UEFA Champions League Championship?\" \u2192 Yes: 0.00, Volume: $5.2M\n- \"Will Bitcoin reach $1,000,000 by December 31, 2026?\" \u2192 Yes: 0.01, Volume: $2.4M\n- \"US announces end of Iranian blockade by August 15, 2026?\" \u2192 Yes: 0.01, Volume: $3.0M\n- \"Will 2 Fed rate cuts happen in 2026?\" \u2192 Yes: 0.04, Volume: $2.7M\n\nInformation gaps:\n - No July/August 2026 FEC filing news on Yass or Andreessen/Horowitz contributions\n - Unknown whether WaPo will refresh the leaderboard between Aug 20 filings and Sept 1\n - No historical base rate for how often the top-donor rank flips over a two-month window\n - Unclear whether WaPo counts organizations (e.g., One Nation) as eligible \u0027donors\u0027\n\nKey uncertainties:\n - Whether Musk makes a single large committee contribution before Aug 20 filings\n - Whether the July 21 figures were genuinely updated or stale\n - Timing lag between contributions and FEC reporting captured by WaPo\n - Possible new mega-entrant (e.g., crypto or AI-industry individual donors)",
"forecast_prompt": "You are an elite superforecaster. Estimate the probability of each option for this Metaculus multiple-choice question.\n\n## Question\nWho will be the largest Republican donor in the 2026 cycle, as of September 1, 2026?\n\n## Description / Resolution Criteria\n## Description\nThe Washington Post, [Meet the megadonors pouring more than \\$1.3 billion into the 2026 election](https://www.washingtonpost.com/elections/interactive/2026/06/25/these-are-biggest-individual-donors-2026-election-cycle/):\u0026#x20;\n\n\u003e The top donors in American politics have poured more than \\$1.3 billion so far this cycle into influencing the country\u2019s politics, according to a Washington Post analysis of Federal Election Commission data.\n\n\u003e The donors lean Republican, and cash could prove critical for the GOP to maintain control of Congress in November. In the first half of 2026, Republican-leaning donors gave \\$880 million, compared with \\$290 million from Democratic-leaning givers and \\$200 million from bipartisan and special interest groups.\n\n\u003e But most of the money, regardless of affiliation, was given to super PACs that can legally accept unlimited sums.\n\nAccording to the Post, as of June 29, 2026 the highest Republican donors were:\u0026#x20;\n\n1. Ben Horowitz \u0026 Marc Andreessen: \\$91.3 million\n2. Elon Musk: \\$90.6 million\n3. Jeff \u0026 Janine Yass: \\$89.3 million\n4. Elizabeth \u0026 Richard Uihlein: \\$69.5 million\n5. Miriam Adelson: \\$67.6 million\n\n`{\"format\": \"metac_reveal_and_close_in_period\", \"info\": {\"post_id\": 45016, \"question_id\": 45169}}`\n\n## Resolution Criteria\nThis question resolves as the Republican-aligned donor, according to the Washington Post at its Top 50 donors [leaderboard](https://www.washingtonpost.com/elections/interactive/2026/06/25/these-are-biggest-individual-donors-2026-election-cycle/), who has donated the highest amount in the 2026 election cycle, as of September 1, 2026.\n\n## Fine Print\nIf someone else is the top donor or in the event of a tie, the question resolves as **Other**.\u0026#x20;\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/45016) which opened on 2026-08-03 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## Options\n - Ben Horowitz \u0026 Marc Andreessen\n - Elon Musk\n - Jeff \u0026 Janine Yass\n - Elizabeth \u0026 Richard Uihlein\n - Miriam Adelson\n - Other\n\n## Sub-question decomposition (planner)\n- (w=0.30) Will Ben Horowitz \u0026 Marc Andreessen be listed as the top Republican-aligned donor on the Washington Post Top 50 donors leaderboard as of September 1, 2026? \u2014 They led the June 29 snapshot ($91.3M), so incumbency at the top is the base case unless newer FEC filings shift the ran\n- (w=0.30) Will Elon Musk be listed as the top Republican-aligned donor on the WaPo leaderboard as of September 1, 2026? \u2014 Musk was within $0.7M of the lead and has the largest capacity/history of massive late super PAC infusions; any new Amer\n- (w=0.20) Will Jeff \u0026 Janine Yass be listed as the top Republican-aligned donor on the WaPo leaderboard as of September 1, 2026? \u2014 Yass was $2M off the lead and is a consistently high-volume, steady giver to Club for Growth-aligned and school-choice P\n- (w=0.20) Will the top Republican-aligned donor as of September 1, 2026 be someone other than Horowitz/Andreessen, Musk, or Yass (e.g., Uihlein, Adelson, or a new entrant), or will the leaderboard be tied/not updated in a way that forces \u0027Other\u0027? \u2014 Uihlein ($69.5M) and Adelson ($67.6M) are within ~$25M and often make single very large late-cycle contributions; also c\n\n## Synthesized evidence\n1. [sq1 | web_search | STRONG cred 80 | UP | DATED] WaPo leaderboard updated July 21, 2026 (data through July 20) still shows Horowitz \u0026 Andreessen first among Republicans at $91.3M.\n2. [sq1 | web_search | WEAK cred 45 | NEUTRAL | DATED] The July 21 update lists identical dollar figures ($91.3M/$90.6M/$89.3M) to the June 29 snapshot, suggesting possibly stale or unchanged top-three totals.\n3. [sq2 | web_search | STRONG cred 85 | UP | DATED] Musk trailed Andreessen/Horowitz by only $0.7M ($90.6M vs $91.3M) in the latest reported WaPo figures, a gap under 1%.\n4. [sq2 | web_search | MODERATE cred 75 | UP | DATED] In late June Musk gave $5M each to House and Senate GOP leadership super PACs plus $5M to Trump\u0027s PAC.\n5. [sq2 | web_search | MODERATE cred 70 | UP | RECENT] The Hill reported (~early August 2026) that Musk plans a big political ad buy across eight states.\n6. [sq2 | article_search | MODERATE cred 85 | UP | DATED] Musk became the world\u0027s first trillionaire after the SpaceX IPO in June 2026, giving him effectively unconstrained donation capacity.\n7. [sq2 | web_search | MODERATE cred 80 | DOWN | DATED] Direct independent expenditures are excluded from WaPo\u0027s methodology, so Musk ad buys made outside committee contributions would not count toward his total.\n8. [sq3 | web_search | MODERATE cred 75 | NEUTRAL | DATED] Jeff \u0026 Janine Yass were third among Republicans at $89.3M, $2M behind the leader, with no reported July/August contributions found.\n9. [sq4 | web_search | WEAK cred 60 | UP | DATED] One Nation, a Republican-aligned nonprofit at $70.7M, appears on the leaderboard alongside individuals, creating ambiguity about non-individual entrants.\n10. [sq4 | web_search | MODERATE cred 80 | DOWN | DATED] Uihlein ($69.5M) and Adelson ($67.6M) trail the leader by ~$22-24M, a large gap to close in two months.\n11. [sq4 | article_search | MODERATE cred 88 | NEUTRAL | DATED] A June 30 Supreme Court ruling erased party-candidate coordination limits, expected to inject substantially more money into GOP-aligned committees ahead of November.\n12. [sq1 | code_execution | WEAK cred 35 | NEUTRAL | VERY_RECENT] Monte Carlo of lumpy super PAC giving from the June baselines yields Musk 30%, Yass 28%, Andreessen/Horowitz 22%, Adelson 10%, other 6%, Uihlein 3%.\n\n## Cross-Market Signals\n\n### Polymarket\n- \"Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.00, Volume: $5.3M\n- \"Will there be no change in Fed interest rates after the September 2026 meeting?\" \u2192 Yes: 0.74, Volume: $7.7M\n- \"Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.01, Volume: $8.6M\n- \"Will the Fed increase interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.24, Volume: $7.1M\n- \"Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.00, Volume: $4.6M\n- \"US announces end of Iranian blockade by September 30, 2026?\" \u2192 Yes: 0.39, Volume: $653.0K\n- \"Will Shakhtar Donetsk win the 2026-27 UEFA Champions League Championship?\" \u2192 Yes: 0.00, Volume: $5.2M\n- \"Will Bitcoin reach $1,000,000 by December 31, 2026?\" \u2192 Yes: 0.01, Volume: $2.4M\n- \"US announces end of Iranian blockade by August 15, 2026?\" \u2192 Yes: 0.01, Volume: $3.0M\n- \"Will 2 Fed rate cuts happen in 2026?\" \u2192 Yes: 0.04, Volume: $2.7M\n\nInformation gaps:\n - No July/August 2026 FEC filing news on Yass or Andreessen/Horowitz contributions\n - Unknown whether WaPo will refresh the leaderboard between Aug 20 filings and Sept 1\n - No historical base rate for how often the top-donor rank flips over a two-month window\n - Unclear whether WaPo counts organizations (e.g., One Nation) as eligible \u0027donors\u0027\n\nKey uncertainties:\n - Whether Musk makes a single large committee contribution before Aug 20 filings\n - Whether the July 21 figures were genuinely updated or stale\n - Timing lag between contributions and FEC reporting captured by WaPo\n - Possible new mega-entrant (e.g., crypto or AI-industry individual donors)\n\n## Required pre-forecast walkthrough\n\nBefore giving probabilities, address these explicitly in your rationale:\n (a) The time left until the question resolves.\n (b) The status quo outcome \u2014 the option most likely if nothing changes from today.\n (c) An outcome that would be SURPRISING but plausible.\n\n## Calibration guidance\n\n- **Status quo anchoring.** Good forecasters put extra weight on the status quo option because the world changes slowly most of the time.\n- **Leave moderate probability on most options.** Good forecasters don\u0027t drop options to ~0% \u2014 leave \u22653-5% on every option to account for unexpected outcomes, unless you have strong specific evidence ruling them out.\n- Avoid uniform-distribution laziness \u2014 most options are not equally likely.\n- **Anchor on prediction markets.** If liquid market prices (Polymarket / Kalshi) for these options appear in the evidence, treat them as a strong prior and stay close to them absent specific contrary evidence.\n\n## Output\n\nReturn ONLY valid JSON, no markdown fences:\n\n{\n \"rationale\": \"\u003caddress (a) (b) (c) above, then explain your distribution \u2014 4-7 sentences total\u003e\",\n \"probabilities\": {\n \"Ben Horowitz \u0026 Marc Andreessen\": \u003cprob\u003e,\n \"Elon Musk\": \u003cprob\u003e,\n \"Jeff \u0026 Janine Yass\": \u003cprob\u003e,\n \"Elizabeth \u0026 Richard Uihlein\": \u003cprob\u003e,\n \"Miriam Adelson\": \u003cprob\u003e,\n \"Other\": \u003cprob\u003e\n }\n}\n\nProbabilities MUST sum to ~1.0 (renormalization is applied; close enough is fine).\n",
"models": [
"opus",
"secondary"
],
"probabilities": {
"Ben Horowitz \u0026 Marc Andreessen": 0.37,
"Elizabeth \u0026 Richard Uihlein": 0.05,
"Elon Musk": 0.30000000000000004,
"Jeff \u0026 Janine Yass": 0.185,
"Miriam Adelson": 0.05,
"Other": 0.045
},
"rationale": "(a) Roughly one month remains between the question\u0027s opening (Aug 3, 2026) and the Sept 1 resolution snapshot, with one meaningful FEC data drop (Aug 20 monthly filings covering July) that WaPo may or may not incorporate before Sept 1. (b) The status quo outcome is Ben Horowitz \u0026 Marc Andreessen, who led at $91.3M in both the June 29 and July 21 leaderboard snapshots; if nothing updates or nothing large lands, they stay on top. (c) A surprising but plausible outcome would be an \u0027Other\u0027 resolution \u2014 e.g., a new AI/crypto mega-entrant surging past $91M after the June 30 Supreme Court coordination ruling unleashed party-committee giving, or WaPo counting an entity like One Nation ($70.7M) among the top donors. The dominant consideration is how razor-thin the leads are: Musk trails by $0.7M and Yass by $2.0M, sums that a single routine contribution would erase \u2014 so a rank flip is genuinely likely conditional on the leaderboard refreshing with new data. Musk has both unmatched capacity (post-SpaceX-IPO wealth) and demonstrated recent committee giving ($5M tranches in late June), though his headline ad buys may be independent expenditures excluded from WaPo\u0027s methodology, which caps his upside. Yass is a steady high-volume giver but with no reported July/August activity. Uihlein and Adelson trail by ~$22-24M, a gap requiring a single very large late infusion \u2014 possible but unlikely in one month. I therefore weight status quo most heavily, with substantial probability on Musk and meaningful probability on Yass, and small floors elsewhere.",
"top_option": "Ben Horowitz \u0026 Marc Andreessen"
},
"plan": {
"combination_logic": "weighted_average",
"domain": "politics",
"n_sub_qs": 4,
"n_tools": 4,
"reasoning_approach": "Anchor on the June 29 WaPo snapshot (near-tie between Andreessen/Horowitz and Musk, with Yass close), then update with any July/August FEC-filing news of large new contributions found via news search; the simulation provides a base rate for rank-flip probability given lumpy giving, and the sub-question probabilities are blended by weighted average into the multiple-choice option probabilities.",
"sub_questions": [
{
"id": "sq1",
"question": "Will Ben Horowitz \u0026 Marc Andreessen be listed as the top Republican-aligned donor on the Washington Post Top 50 donors leaderboard as of September 1, 2026?",
"rationale": "They led the June 29 snapshot ($91.3M), so incumbency at the top is the base case unless newer FEC filings shift the ranking.",
"weight": 0.3
},
{
"id": "sq2",
"question": "Will Elon Musk be listed as the top Republican-aligned donor on the WaPo leaderboard as of September 1, 2026?",
"rationale": "Musk was within $0.7M of the lead and has the largest capacity/history of massive late super PAC infusions; any new America PAC-style transfer reported in July/August filings would put him first.",
"weight": 0.3
},
{
"id": "sq3",
"question": "Will Jeff \u0026 Janine Yass be listed as the top Republican-aligned donor on the WaPo leaderboard as of September 1, 2026?",
"rationale": "Yass was $2M off the lead and is a consistently high-volume, steady giver to Club for Growth-aligned and school-choice PACs.",
"weight": 0.2
},
{
"id": "sq4",
"question": "Will the top Republican-aligned donor as of September 1, 2026 be someone other than Horowitz/Andreessen, Musk, or Yass (e.g., Uihlein, Adelson, or a new entrant), or will the leaderboard be tied/not updated in a way that forces \u0027Other\u0027?",
"rationale": "Uihlein ($69.5M) and Adelson ($67.6M) are within ~$25M and often make single very large late-cycle contributions; also captures resolution ambiguity/ties.",
"weight": 0.2
}
],
"tool_requests": [
{
"parameters": {
"brief": "Find the most recent state of the Washington Post \u0027biggest individual donors of the 2026 election cycle\u0027 Top 50 leaderboard (published June 25, 2026, updated periodically). Identify who currently leads among Republican-aligned donors and the dollar amounts for Ben Horowitz \u0026 Marc Andreessen, Elon Musk, Jeff \u0026 Janine Yass, Elizabeth \u0026 Richard Uihlein, and Miriam Adelson. Also find news of any very large (\u003e$20M) individual contributions to Republican super PACs disclosed in July or August 2026 FEC filings (semi-annual/mid-year and monthly reports), especially from Elon Musk (America PAC or successor), Andreessen/Horowitz, Yass, Uihlein, Adelson, Timothy Mellon, Ken Griffin, or Paul Singer.",
"max_searches": 5,
"question_title": "Who will be the largest Republican donor in the 2026 cycle, as of September 1, 2026?"
},
"target_sub_questions": [
"sq1",
"sq2",
"sq3",
"sq4"
],
"tool_name": "claude_news"
},
{
"parameters": {
"queries": [
"Washington Post top donors 2026 election cycle leaderboard largest Republican donor",
"Elon Musk super PAC donation August 2026 FEC filing millions",
"biggest megadonor 2026 midterms Andreessen Horowitz Yass Uihlein Adelson"
]
},
"target_sub_questions": [
"sq1",
"sq2",
"sq3",
"sq4"
],
"tool_name": "web_search"
},
{
"parameters": {
"lookback_days": 90,
"queries": [
"largest Republican megadonor 2026 midterms super PAC contribution",
"Elon Musk political spending 2026 midterms America PAC",
"FEC July 2026 filings super PAC megadonor millions Republican"
]
},
"target_sub_questions": [
"sq1",
"sq2",
"sq3",
"sq4"
],
"tool_name": "article_search"
},
{
"parameters": {
"code": "import numpy as np\nnp.random.seed(0)\n# Baseline June 29 totals ($M)\nbase = {\u0027AndreessenHorowitz\u0027:91.3,\u0027Musk\u0027:90.6,\u0027Yass\u0027:89.3,\u0027Uihlein\u0027:69.5,\u0027Adelson\u0027:67.6,\u0027OtherTop\u0027:55.0}\nN=50000\n# Two months of additional giving; heavy-tailed lumpy contributions\nnames=list(base.keys())\n# per-donor: prob of a big lump in the window, size distribution, plus steady flow\nparams={\u0027AndreessenHorowitz\u0027:(0.35,25,4),\u0027Musk\u0027:(0.45,45,3),\u0027Yass\u0027:(0.55,20,6),\u0027Uihlein\u0027:(0.45,15,4),\u0027Adelson\u0027:(0.40,35,3),\u0027OtherTop\u0027:(0.30,40,3)}\ntot={}\nfor n in names:\n p,scale,steady = params[n]\n lump = (np.random.rand(N)\u003cp)*np.random.exponential(scale,N)\n flow = np.random.exponential(steady,N)\n tot[n]=base[n]+lump+flow\nM=np.vstack([tot[n] for n in names])\nwin=np.argmax(M,axis=0)\nfor i,n in enumerate(names):\n print(n, round((win==i).mean(),3))\n",
"description": "Monte Carlo of who leads the Republican donor ranking by Sept 1 given June 29 baselines and lumpy super PAC contribution dynamics."
},
"target_sub_questions": [
"sq1",
"sq2",
"sq3",
"sq4"
],
"tool_name": "code_execution"
}
]
},
"question": {
"close_time": "2026-08-15T09:00:00Z",
"description": "## Description\nThe Washington Post, [Meet the megadonors pouring more than \\$1.3 billion into the 2026 election](https://www.washingtonpost.com/elections/interactive/2026/06/25/these-are-biggest-individual-donors-2026-election-cycle/):\u0026#x20;\n\n\u003e The top donors in American politics have poured more than \\$1.3 billion so far this cycle into influencing the country\u2019s politics, according to a Washington Post analysis of Federal Election Commission data.\n\n\u003e The donors lean Republican, and cash could prove critical for the GOP to maintain control of Congress in November. In the first half of 2026, Republican-leaning donors gave \\$880 million, compared with \\$290 million from Democratic-leaning givers and \\$200 million from bipartisan and special interest groups.\n\n\u003e But most of the money, regardless of affiliation, was given to super PACs that can legally accept unlimited sums.\n\nAccording to the Post, as of June 29, 2026 the highest Republican donors were:\u0026#x20;\n\n1. Ben Horowitz \u0026 Marc Andreessen: \\$91.3 million\n2. Elon Musk: \\$90.6 million\n3. Jeff \u0026 Janine Yass: \\$89.3 million\n4. Elizabeth \u0026 Richard Uihlein: \\$69.5 million\n5. Miriam Adelson: \\$67.6 million\n\n`{\"format\": \"metac_reveal_and_close_in_period\", \"info\": {\"post_id\": 45016, \"question_id\": 45169}}`\n\n## Resolution Criteria\nThis question resolves as the Republican-aligned donor, according to the Washington Post at its Top 50 donors [leaderboard](https://www.washingtonpost.com/elections/interactive/2026/06/25/these-are-biggest-individual-donors-2026-election-cycle/), who has donated the highest amount in the 2026 election cycle, as of September 1, 2026.\n\n## Fine Print\nIf someone else is the top donor or in the event of a tie, the question resolves as **Other**.\u0026#x20;\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/45016) which opened on 2026-08-03 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.",
"options": [
"Ben Horowitz \u0026 Marc Andreessen",
"Elon Musk",
"Jeff \u0026 Janine Yass",
"Elizabeth \u0026 Richard Uihlein",
"Miriam Adelson",
"Other"
],
"question_type": "multiple_choice",
"title": "Who will be the largest Republican donor in the 2026 cycle, as of September 1, 2026?"
},
"research": {
"cross_market_brief": "## Cross-Market Signals\n\n### Polymarket\n- \"Will the Fed increase interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.00, Volume: $5.3M\n- \"Will there be no change in Fed interest rates after the September 2026 meeting?\" \u2192 Yes: 0.74, Volume: $7.7M\n- \"Will the Fed decrease interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.01, Volume: $8.6M\n- \"Will the Fed increase interest rates by 25 bps after the September 2026 meeting?\" \u2192 Yes: 0.24, Volume: $7.1M\n- \"Will the Fed decrease interest rates by 50+ bps after the September 2026 meeting?\" \u2192 Yes: 0.00, Volume: $4.6M\n- \"US announces end of Iranian blockade by September 30, 2026?\" \u2192 Yes: 0.39, Volume: $653.0K\n- \"Will Shakhtar Donetsk win the 2026-27 UEFA Champions League Championship?\" \u2192 Yes: 0.00, Volume: $5.2M\n- \"Will Bitcoin reach $1,000,000 by December 31, 2026?\" \u2192 Yes: 0.01, Volume: $2.4M\n- \"US announces end of Iranian blockade by August 15, 2026?\" \u2192 Yes: 0.01, Volume: $3.0M\n- \"Will 2 Fed rate cuts happen in 2026?\" \u2192 Yes: 0.04, Volume: $2.7M",
"errors": [],
"has_cross_market": true,
"n_errors": 0,
"n_tools": 4,
"tools": [
{
"elapsed_s": 31.27,
"error": null,
"success": true,
"summary": "13 citations",
"tool_name": "claude_news"
},
{
"elapsed_s": 28.56,
"error": null,
"success": true,
"summary": "20 results",
"tool_name": "web_search"
},
{
"elapsed_s": 0.64,
"error": null,
"success": true,
"summary": "20 articles",
"tool_name": "article_search"
},
{
"elapsed_s": 0.13,
"error": null,
"success": true,
"summary": "Monte Carlo of who leads the Republican donor ranking by Sep",
"tool_name": "code_execution"
}
]
},
"synthesis": {
"error": null,
"evidence": [
{
"claim": "WaPo leaderboard updated July 21, 2026 (data through July 20) still shows Horowitz \u0026 Andreessen first among Republicans at $91.3M.",
"credibility": 80,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "STRONG",
"sub_question_id": "sq1"
},
{
"claim": "The July 21 update lists identical dollar figures ($91.3M/$90.6M/$89.3M) to the June 29 snapshot, suggesting possibly stale or unchanged top-three totals.",
"credibility": 45,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "DATED",
"source": "web_search",
"strength": "WEAK",
"sub_question_id": "sq1"
},
{
"claim": "Musk trailed Andreessen/Horowitz by only $0.7M ($90.6M vs $91.3M) in the latest reported WaPo figures, a gap under 1%.",
"credibility": 85,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "STRONG",
"sub_question_id": "sq2"
},
{
"claim": "In late June Musk gave $5M each to House and Senate GOP leadership super PACs plus $5M to Trump\u0027s PAC.",
"credibility": 75,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "MODERATE",
"sub_question_id": "sq2"
},
{
"claim": "The Hill reported (~early August 2026) that Musk plans a big political ad buy across eight states.",
"credibility": 70,
"direction": "UP",
"priced_in": false,
"recency": "RECENT",
"source": "web_search",
"strength": "MODERATE",
"sub_question_id": "sq2"
},
{
"claim": "Musk became the world\u0027s first trillionaire after the SpaceX IPO in June 2026, giving him effectively unconstrained donation capacity.",
"credibility": 85,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq2"
},
{
"claim": "Direct independent expenditures are excluded from WaPo\u0027s methodology, so Musk ad buys made outside committee contributions would not count toward his total.",
"credibility": 80,
"direction": "DOWN",
"priced_in": false,
"recency": "DATED",
"source": "web_search",
"strength": "MODERATE",
"sub_question_id": "sq2"
},
{
"claim": "Jeff \u0026 Janine Yass were third among Republicans at $89.3M, $2M behind the leader, with no reported July/August contributions found.",
"credibility": 75,
"direction": "NEUTRAL",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "MODERATE",
"sub_question_id": "sq3"
},
{
"claim": "One Nation, a Republican-aligned nonprofit at $70.7M, appears on the leaderboard alongside individuals, creating ambiguity about non-individual entrants.",
"credibility": 60,
"direction": "UP",
"priced_in": false,
"recency": "DATED",
"source": "web_search",
"strength": "WEAK",
"sub_question_id": "sq4"
},
{
"claim": "Uihlein ($69.5M) and Adelson ($67.6M) trail the leader by ~$22-24M, a large gap to close in two months.",
"credibility": 80,
"direction": "DOWN",
"priced_in": true,
"recency": "DATED",
"source": "web_search",
"strength": "MODERATE",
"sub_question_id": "sq4"
},
{
"claim": "A June 30 Supreme Court ruling erased party-candidate coordination limits, expected to inject substantially more money into GOP-aligned committees ahead of November.",
"credibility": 88,
"direction": "NEUTRAL",
"priced_in": true,
"recency": "DATED",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq4"
},
{
"claim": "Monte Carlo of lumpy super PAC giving from the June baselines yields Musk 30%, Yass 28%, Andreessen/Horowitz 22%, Adelson 10%, other 6%, Uihlein 3%.",
"credibility": 35,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "VERY_RECENT",
"source": "code_execution",
"strength": "WEAK",
"sub_question_id": "sq1"
}
],
"information_gaps": [
"No July/August 2026 FEC filing news on Yass or Andreessen/Horowitz contributions",
"Unknown whether WaPo will refresh the leaderboard between Aug 20 filings and Sept 1",
"No historical base rate for how often the top-donor rank flips over a two-month window",
"Unclear whether WaPo counts organizations (e.g., One Nation) as eligible \u0027donors\u0027"
],
"key_uncertainties": [
"Whether Musk makes a single large committee contribution before Aug 20 filings",
"Whether the July 21 figures were genuinely updated or stale",
"Timing lag between contributions and FEC reporting captured by WaPo",
"Possible new mega-entrant (e.g., crypto or AI-industry individual donors)"
],
"n_evidence": 12
},
"timings": {
"forecast": 43.75,
"plan": 30.26,
"research": 31.27,
"synthesis": 30.56
}
}