Will Democrats win the 2026 national House popular vote by at least 10 percentage points? — Democrats, ≥10%

- [2026-10-12] Silver Bulletin's generic ballot average is D+8.8, down slightly from a cycle high of D+9.1. Its likely-voter-adjusted version, used in its forecast, is D+9.5. Silver says the Democratic surge began in early September and that Republican support has trended down since late September. https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls - [2026-10-09] An earlier Silver Bulletin update had D+8.9, with Democrats above 50% in the average for the first time. The likely-voter version was D+9.6 on 10/5. https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls - [2026-10-13] FiftyPlusOne's generic ballot average is D+8, 50.9% to 43.2%. https://fiftyplusone.news/polls/generic-ballot/generic-ballot - [2026-10-11] The DDHQ average is D+7.7, 49.0% to 41.3%. The page's poll table also lists rows dated after today and links to example.com, so I treated that table as unreliable. The headline figure matches Hill coverage of DDHQ. https://votes.decisiondeskhq.com/polls/generic-ballot/national - [2026-10-13] Other averages are lower. Poliwave's model uses D 49.3%, R 41.3%, polls through Oct 11 (about D+8). PollsMax and USPollingData have D+7.4. https://www.poliwave.com/us/fed/projection and https://www.pollsmax.com/approval/generic-ballot/ - [2026-10-13] The NewsNation/DDHQ poll (TrueDot, Oct 5–9, 974 likely voters) has D 49%, R 42%, with 8% undecided. Trump's favorability is 38%/60%. https://thehill.com/homenews/campaign/6143963-democrats-lead-congressional-ballot-ddhq/ - [2026-10-04 to 10-10] Recent individual polls vary widely: - Economist/YouGov (Oct 5, likely voters): D+10. - Pew (Oct 10 report, registered voters): D+8. - CBS/YouGov (Oct 2, adults): D+9. - Morning Consult (Oct 4, likely voters): D+7. - Morning Consult (Oct 5–11): D+6.6. - Cygnal (R) (Oct 2): D+9.1. - Noble Predictive Insights (Oct 7): D+5. - ActiVote (Oct 3): D+4.4. - Emerson (Sept 24): D+11. - Economist/YouGov (Sept 28): D+15, an outlier. https://www.pollsmax.com/approval/generic-ballot/ and https://politicalwire.com/2026/10/10/democrats-solidly-ahead-on-generic-ballot/ - [2026-10-13] DDHQ's forecast gives Democrats a 77% chance of winning the House and 56% in the Senate. https://votes.decisiondeskhq.com/forecast/2026 - [2026-10-12] DDHQ projects 235 Democratic House seats. In Poliwave's model, the median is 229 seats and the chance of a Democratic House is 83%. https://votes.decisiondeskhq.com/forecast/2026/house - [2026-08-03] FiftyPlusOne's pre-October forecast had a median Democratic House popular vote margin of +7, plus or minus 5. This is older than the polls above. https://blog.fiftyplusone.news/p/election-forecast-democrats-strongly-favored-house-tilt-senate - [2026-10-05] Kalshi's popular-vote ladder, a sibling market (strikes are in 2-point bands), showed "Democrats 8 to 10%" as the leading bucket at about 28%, "10 to 12%" at about 22%, and "6 to 8%" at about 19%. Kalshi's House-control market was at about 90% Democratic on 10/13. https://kalshi.com/markets/kxhousepopvotemargin/national-house-popular-vote-margin/kxhousepopvotemargin-27nov03 and https://news.kalshi.com/p/2026-midterm-odds-democrats-favored-house-senate - [2026-10-13] Polymarket's popular-vote ladder is a thin market, with date unclear. Its leading buckets included "Republicans 6%+" at 26% and "Democrats 6-8%" at 25%. That looks stale next to the current polls. https://polymarket.com/event/2026-midterms-house-popular-vote-margin-of-victory-224/will-the-democratic-party-win-the-popular-vote-in-the-2026-us-house-of-representatives-midterm-elections-by-between-6-and-8-942 - [2026-10-12] The Northeastern analysis puts the generic lead at about 9 points. https://news.northeastern.edu/2026/10/12/november-midterms-political-analysis/ BOTTOM LINE: Generic ballot averages are D+7.4 to D+8.8 (D+9.5 likely-voter-adjusted at Silver Bulletin), trending Democratic since early September but flattening in the last week. The 10-point threshold is slightly above the central polling estimate. Election day is Nov 3, and the generic ballot does not translate one-for-one into the final House vote, partly because of uncontested seats. NOT FOUND: the current price of this contract (not searched, per instructions). Any official House popular vote result (the election hasn't happened). A readable Silver Bulletin forecast-page popular vote projection (paywalled). The Cook and Sabato popular-vote projections.

- [2026-10-09] Silver Bulletin's generic ballot average is D+8.9, a cycle high. Its likely-voter-adjusted version is D+9.6 (51.3–41.6). On 10/12 it showed D+8.8, or D+9.5 adjusted. https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls - [2026-10-13] Other generic-ballot averages are lower than Silver's. FiftyPlusOne is D+8 (50.9–43.2). DDHQ was D+7.7 on 10/11. uspollingdata and pollsmax show D+7.4. RealClearPolling is about D+8, per RedState. https://fiftyplusone.news/polls/generic-ballot/generic-ballot - [2026-10-13] Recent individual polls range widely. NewsNation/DDHQ is D+7 (49–42, likely voters). Economist/YouGov was D+10 on 10/5 and D+15 on 9/28. ActiVote is D+4.4. Cygnal (R) is D+9.1. Morning Consult is D+6.6 to D+7. https://www.pollsmax.com/approval/generic-ballot/ - [2026-10-06] Trend: Silver's lead was 7.4 on 9/4 and rose to 9.6 by 10/6. Trump's net approval is about -22.5, which Beaumont says is worse than any president since Truman at this point. The author warns that falling petrol prices could help Republicans. Silver's model gives Democrats a 93% chance at the House. https://theconversation.com/republicans-continue-to-slide-in-us-polls-four-weeks-before-midterm-elections-293444 - [2026-08-03] FiftyPlusOne's launch forecast had a median Democratic House popular vote margin of +7, plus or minus 5, and a median of 230 seats. A later check of its model was not found. https://blog.fiftyplusone.news/p/election-forecast-democrats-strongly-favored-house-tilt-senate - [2026-10-07] Kalshi's House popular vote margin ladder, as relayed by vote-scope, was: D 8–10 at 28%, D 10–12 at 23%, D 6–8 at 18%, D 12–14 at 9.5%, D 14–16 at 3.6%, D 16+ at 2%. Summing the 10+ buckets gives about 38%. This is a secondary source, and I could not fetch the page (403). https://vote-scope.com/en/us/house/ - [2026-10-13] Polymarket's separate popular-vote ladder is thin: tiny volumes and odd prices, for example 14% on D16+ and 3% on D10–12. Treat it as unreliable. https://polymarket.com/event/2026-midterms-house-popular-vote-margin-of-victory-224/will-the-democratic-party-win-the-popular-vote-in-the-2026-us-house-of-representatives-midterm-elections-by-between-6-and-8-942 - [2018 reference] The 2018 Democratic House popular vote margin was +8.6, the largest for a minority party on record since 1942. The 2018 final generic average was roughly D+7 to D+8, so polls were close. https://www.cnn.com/2018/12/06/politics/latest-house-vote-blue-wave - [Historical base rate] Wave-year House popular vote margins: 1994 R+7.1, 2006 D+8.0, 2010 R+7.2 (7.2 per Wang; 6.8 in another source), 2014 R+5.7, 2018 D+8.6. The cited 1946 Republican margin was R+8.5. In the sources I fetched, no midterm margin reached 10 points for either party. A D+10 result would be a record for post-1942 House elections. https://edition.cnn.com/2018/11/26/politics/2018-midterms-democratic-wave/index.html - [2026-10-05] Polling-error caveat: the question needs about a +1 point beat against the Silver likely-voter average (+9.6) and about +2 against the registered-voter averages (D+8). Silver says likely-voter screens favor Democrats in midterms. RedState and others argue polls understate Republicans. The generic ballot polled at D+4 to D+5 in Nov 2025 and D+5.3 in Jan 2026, so the lead has grown during the cycle. https://www.natesilver.net/p/generic-ballot-average-2026-nate-silver-bulletin-congress-polls - [2026-10-13] Seat forecasts all favor Democrats. DDHQ gives Democrats 77% for the House. Poliwave gives 83% and a median of 229 seats. Kalshi's House-control market was about 90% D. Poliwave's method uses a 35% pull toward the forecast margin. https://votes.decisiondeskhq.com/forecast/2026 - [2026-10-01] Henry Olsen (WaPo, via RCP) says a D+8.3 generic ballot predicts about 225 Democratic districts. https://www.realclearpolitics.com/2026/10/01/2026_midterms_what_the_generic_ballot_polls_tell_us_712674.html BOTTOM LINE: Current polling averages (D+7.4 to D+9.6) sit just under the 10-point threshold, and no modern House election has produced a popular vote margin of 10 or more, so a Yes result needs a record-sized wave or a polling miss in Democrats' favor. The 2018 outcome matched its final generic average closely, but the generic ballot has historically erred by several points either way, so 10+ is a live tail rather than the central case. NOT FOUND: Historical generic-ballot error stats by cycle. Kalshi's own page for this contract (deliberately not searched). Any current 538-style expert popular-vote forecast other than FiftyPlusOne's August one. The Cook, Sabato and Silver model national-vote medians.

YES means: Democratic candidates' combined share of the national House vote in the Nov 3, 2026 general election exceeds Republican candidates' by 10.0 points or more. - [2026-10-14] Special elections point to a sustained Democratic overperformance. Democrats beat Harris's 2024 margins by a median of 10.4 points in 37 contested state-legislative specials from January to April. They held about 10 points in six later specials, with no 2018-style second-half collapse. In 2018 that figure fell to 0.2 points after April, and the general election came in at +3.9. MultiState's own projection is a 6–9 point overperformance in November. Caveat: the six later races are a small sample. That 6–9 point swing is on top of Harris's roughly 2.7-point 2024 national loss, so it implies a D+3 to D+6 House margin on a mechanical swing basis. It is not a clean D+10 path by itself. https://www.multistate.us/insider/2026/10/14/democrats-special-election-edge-still-points-to-a-big-year-democratic-wave - [2026-10-13] Rasmussen, a Republican-leaning pollster, has Democrats 49–44 (D+5) in its Oct 12 weekly poll, up 2 points from the prior week. Even Republican-leaning pollsters therefore show the lead growing. https://rasmussenreports.com/public_content/politics/mood_of_america/generic_congressional_ballot_oct12 - [2026-10-13] The Oct 5 Economist/YouGov likely-voter poll showed D+10 (52–42), and Big Data Poll (R) also shows D+11. The pollsmax list also shows Focaldata (Oct 6, registered voters) at D+8.2 and Centerline (Oct 1, likely voters) at D+8. At least some quality pollsters are already at or above the threshold. https://www.pollsmax.com/approval/generic-ballot/ - [2026-10-14] Poliwave's model, with polls through Oct 11, uses D 49.3 and R 41.3 and has Trump's net approval at −18.5. Its 80% seat range runs up to 247 Democratic seats. The 229-seat median was noted earlier, and this extreme is what a D+10-plus environment would look like. https://www.poliwave.com/us/fed/projection - [2026-09-18] G. Elliott Morris (FiftyPlusOne) argues the race raters are lowballing Democrats. Since 1990, out-party candidates in "tossup" races have won about two-thirds of them. His model had Democrats at a median of 238 seats, with a 98% chance of a majority, and he describes likely-voter generic ballot polls at D+7 at that time. That is a seat count above the Aug 3 median of 230. It implies his model's national margin has moved up since August. Likely-voter polls also sit above registered-voter polls: Silver's adjustment adds about 0.7 points. https://www.gelliottmorris.com/p/2026-09-18-race-raters-lagging-midterms - [2026-10-14] Fox News Power Rankings say the Democratic generic lead is wider and more enduring than in 2018, and place a "good night" at 237 seats and a "great night" at up to 249. Fox is a Republican-friendly outlet, so this is a notable concession. https://www.foxnews.com/politics/fox-news-power-rankings-house-falls-senate-stays-play - [2026-09-30] Fewer uncontested races reduce the usual Republican-leaning distortion. Only 18 districts have just one major party on the ballot, down from 37 in 2024. Only 5 seats are totally unopposed, down from 25 in 2024. All nine seats with no opponent from one major party are cases where Republicans did not field a candidate. That lets Democrats gain turnout in safe-D seats (more contested races means more votes for the Democratic and Republican candidates in each), and it removes the earlier worry about uncontested seats. Seats where the Democratic candidate is the only one on the ballot do not count as extra Democratic votes in the margin either. https://www.270towin.com/2026-house-election-uncontested-races/ - [2026-10-12] The Northeastern analysis cites Reuters/Ipsos, which has Trump's approval at about 32%, a level it calls near historic lows heading into a midterm. The comparison is George W. Bush's 38% in 2006, when Democrats won by +8.0. Trump is below that benchmark, so a bigger margin than 2006 is plausible. https://news.northeastern.edu/2026/10/12/november-midterms-political-analysis/ - [2026-08-?? to 2026-10-14] DDHQ noted that Democrats' generic lead rose after the Iran conflict reignited and gas prices rose. Cost-of-living concerns are the mechanism. Fox says rural voters are blaming Republicans for gas and diesel prices. The earlier Silver Bulletin note on Republican support trending down since late September also fits. https://decisiondeskhq.substack.com/p/democrats-generic-ballot-august-2026-midterms-house-senate - [2026-10-13] Counterpoint to my own side: Enten's data, relayed by RedState, say early-October generic polls understated Republicans in 14 of 16 cycles since 1994. Against that, Silver's likely-voter adjustment benefits Democrats. https://redstate.com/kyle-becker/2026/10/13/an-establishment-media-pollster-comes-clean-on-just-how-badly-polls-underestimate-gop-n2208065 BOTTOM LINE: The most likely YES path is the momentum that began in early September continuing through Nov 3. That would take Silver's likely-voter average from about D+9.5 to about D+10–11, with enthusiasm and midterm-turnout effects (Trump approval at 32–38%, gas and cost-of-living anger, 10-point special-election swings) pushing the realized House margin 1–2 points above the polls, at a time when the average sits just below the line. It also requires polls not to understate Republicans, as they did in most cycles since 1994. NOT FOUND: Any published forecast with a median national House margin of 10 or more. FiftyPlusOne's current median popular-vote margin, and the 2018 final-poll versus result error. A fetchable source for a precise generic-ballot-to-vote shift in midterms, apart from the Silver likely-voter adjustment.

YES means: the Democratic share of the national House popular vote minus the Republican share is at least +10.0 points in the November 3, 2026 general election. - [2026-10-03] The FiftyPlusOne forecaster says the polls sit at about D+8. He puts the average generic-ballot error about 30 days out at roughly 3.5 points, and says that in 2018 Democrats led polls by 8–9 but won the House vote by "seven and a half points or so" once uncontested seats are accounted for. This is a mechanism for NO: the 8–9 polling lead translated to a lower margin on his adjusted measure. The contract is likely to use the raw all-candidate vote, which the RCP final figure in the next bullet puts at D+8.4 in 2018. The poll lead needs to rise or the error needs to break one way for D+10. https://paulkrugman.substack.com/p/the-midterms - [2026-10-03] The same transcript has Downballot's "national primary" turnout model pointing to about D+13. That is a Yes-leaning cross-check, but it is a new, untested method. Morris concedes nobody can verify whether pollsters' non-response fixes work. The poll average is the only measure with a long record, and it sits at D+8, below 10. https://paulkrugman.substack.com/p/the-midterms - [2018 final] RealClearPolling's final 2018 average was D+7.3, and the actual result was D+8.4. The Democratic miss against the final poll was about 1 point, and the 2018 result is the high-water mark of the cycles shown here. Applying the same +1.1 beat to today's D+7.4 to D+8.8 averages gives about D+8.5 to D+9.9, still under 10. https://www.realclearpolling.com/polls/state-of-the-union/2018/generic-congressional-vote - [2018 reference] The 2018 comparison is not favorable to YES. Polls in 2018 were also higher than the result in other years. In 2006 the final polling average was D+11 against an actual D+8, and in 2022 the polling average was D+1 against an actual R+2.8. https://uspollingdata.com/news/generic-ballot-what-it-means/ - [historical] FiveThirtyEight's midterm table has final generic-ballot error averaging about 3 points (0 to 5), and 2006 shows a 4-point Democratic overestimate. Errors of that size run in both directions, so D+10 needs a favorable miss against averages that are 1–2.6 points below it. https://fivethirtyeight.com/features/our-best-tool-for-predicting-midterm-elections-works-in-presidential-years-too - [historical] FAIR's analysis of 10 election years found 538's average over-predicted Democrats in 8 of 10 years, by 2.4 points on average, and RCP's by 1.1 on average. The 2020 final average showed D+7.3 against an actual D+3.1. Historically the bias has been toward overstating Democrats, which cuts against the 10-point threshold. https://fair.org/home/in-2022-midterms-media-were-again-misled-by-generic-ballot/ - [historical] Sabato's analysis found the generic ballot has a slope of about 0.69 against the House vote since 1968 (0.87 since 2004). A slope below 1 means large poll leads regress, so D+8 to D+9 maps to less than 8 to 9. https://centerforpolitics.org/crystalball/the-key-to-forecasting-midterms-the-generic-ballot/ - [2026-10-13] Poliwave's model uses only 35% of the gap between the generic ballot and the district forecast's national margin, capped at 8 points, so it does not project a landslide popular vote. Its median is 229 seats with an 80% range of 214–247. https://www.poliwave.com/us/fed/projection - [2026-10-03] ActiVote's Oct 3 poll cut the Democratic lead from 5.6 to 4.4, losing ground among 50–64 voters and Latinos. The fieldwork ran Sept 22 to Oct 2, and ActiVote's lead is "close to the 4.6% we found in early September." This is a sign of a ceiling, though it is one outlier-prone tracker. https://www.activote.net/polls/generic-ballot/2026-10-03/ - [2026-10-13] The TrueDot/NewsNation poll has 8% undecided at D+7 with a 3.2-point margin of error, so the D+7 margin is within sampling error of 10. Undecideds and fading Republican leaners could break back toward the GOP at the end. https://www.breitbart.com/politics/2026/10/13/poll-democrats-lead-republicans-on-generic-congressional-ballot-by-7-points/ - [2026-08-03] FiftyPlusOne's model (median D+7, ±5) was published before the September surge. A D+10 outcome sits at the upper end of that range. https://blog.fiftyplusone.news/p/election-forecast-democrats-strongly-favored-house-tilt-senate - [2026-10-12] Silver Bulletin FLIPR's Oct 13 update says the forecast "held relatively steady" for the past couple of weeks. There is no new surge in the last week, so a status-quo reading leaves averages at D+7.4 to D+8.8. https://www.natesilver.net/p/nate-silver-2026-midterm-election-polls-model BOTTOM LINE: Every poll average and model is below the 10-point mark, and the 2018 wave (the strongest comparable midterm) finished D+8.4 against a D+7.3 poll average. A NO result needs only a normal polling miss or no further movement, and the historical bias in generic ballots has been toward overstating Democrats. NOT FOUND: A Silver Bulletin, Cook or Sabato median national popular vote projection for 2026. The official statement of how Kalshi will source the "all Democratic minus all Republican" vote total (uncontested seats, third parties, and states with no ballot-box tally such as unopposed races). A 2022 data point for how the generic ballot compared with the raw House vote under Kalshi-style counting.