A broad consensus of polls, election models and betting markets is pointing to a Democratic victory in Tuesday’s U.S. midterm elections. Nate Silver’s election model gives Democrats a 95% probability of winning the House and an 80% probability of winning the Senate, while the final New York Times/Siena polls show Democrats leading in every Senate battleground state surveyed, including by 11 points in Michigan and seven in Texas. President Donald Trump carried six of those seven states in 2024.
These expectations have soared so high that some Democrats fear disappointment may be inevitable, especially if the party fails to win the Senate, a prize that seemed beyond reach just months ago.
The Cook Political Report estimates Democrats could win as many as 240 House seats, potentially their largest majority since President Barack Obama’s first year. Prediction market Kalshi gives Democrats a 73% probability of winning both chambers, and nearly $100 million in contracts have been traded on its congressional control market. The final AtlasIntel generic ballot shows Democrats leading by 14 points.
But pollsters remain haunted by the possibility that they are still missing Trump voters. New York Times polling chief Nate Cohn warned that white Democrats were about 30% more likely than white Republicans to respond to the final Times/Siena surveys, a slightly wider gap than in 2020, when polls overstated Democratic support. The Washington Post raised similar alarms after finding Democrat Adam Hamilton leading Republican Senator Roger Marshall by nine points in Kansas, where registered Democrats were more than twice as likely as Republicans to participate.
President Trump and House Speaker Mike Johnson have accused pollsters of deliberately manufacturing the appearance of a Democratic wave to suppress Republican turnout. “They’re trying to create this idea of a blue wave and they’re using the poll numbers to do it,” Johnson said Monday, adding that conservatives distrust polling calls because they believe “it’s a psyop.”
Prediction markets are sometimes touted as more accurate than polls because bettors have money at stake. But their odds often reflect the same polling data and political sentiment, leaving them vulnerable to the same blind spots. Kalshi gave state Representative Francesca Hong a 96% chance of winning the Democratic gubernatorial primary in Wisconsin the day before the August election; she lost. In Brazil, Kalshi gave Trump ally Flávio Bolsonaro an 84% chance of defeating President Lula ahead of last week’s runoff; Lula won.
The polls, forecasts and betting markets are all pointing in one direction, but voters will deliver the only verdict that counts.
Analysis
Why This Matters
- The midterms will determine control of Congress, shaping President Trump’s final two years and setting the stage for the 2028 presidential race.
- A Democratic sweep would give the party the power to block or advance legislation and launch investigations.
- The outcome will test the accuracy of polling methods and prediction markets in the Trump era.
Background
The United States holds midterm elections every two years, with all 435 House seats and roughly a third of Senate seats up for election. The party of the sitting president often loses ground. The 2026 midterms come two years after Donald Trump’s 2024 presidential victory and are widely seen as a referendum on his administration. Pollsters and forecasters have been closely watched after several high-profile misses in recent cycles.
Key Perspectives
Some Democrats: warn that expectations of a wave may be setting the party up for disappointment, especially if it falls short in the Senate.
President Trump and House Speaker Mike Johnson: accuse pollsters of manufacturing a Democratic-wave narrative to suppress Republican turnout, with Johnson calling the polls “a psyop.”
Pollsters and forecasters: acknowledge they may still be underestimating Trump support, citing lower response rates from white Republicans in the final Times/Siena and Washington Post polls.
What to Watch
- The final results on election night, November 5, to see if the predicted Democratic gains materialize.
- Whether polling errors from 2016 and 2020 repeat or if this cycle’s adjustments correct them.
- The reaction from Trump and Republicans if the results diverge from the polls.
Checked
12 claims in this story checked against 1 source: 12 supported.
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- SupportedThe headline says polls, models and markets converge on a “blue tsunami” forecast for the midterms.Axios: “Final polls, models and markets see a "blue tsunami". The threat of a blue tsunami is bearing down on President Trump's Washington, with virtually every major indicator forecasting a Democratic rout in Tuesday's elections.”
- SupportedThe story says a broad consensus points to a Democratic victory in Tuesday’s U.S. midterm elections.Axios: “with virtually every major indicator forecasting a Democratic rout in Tuesday's elections.”
- SupportedNate Silver’s model gives Democrats a 95% chance of winning the House and an 80% chance of winning the Senate.Axios: “95% and 80%: The probability of Democrats winning the House and Senate, respectively, according to election forecaster Nate Silver”
- SupportedThe final New York Times/Siena polls show Democrats leading in all seven Senate battleground states surveyed.Axios: “7 for 7: Democrats lead in every Senate battleground state surveyed in the final New York Times/Siena polls”
- SupportedThose polls show Democrats leading by 11 points in Michigan and seven points in Texas.Axios: “including by 11 points in Michigan and seven in Texas.”
- SupportedTrump carried six of those seven states in 2024.Axios: “Trump carried six of those seven states in 2024”
- SupportedThe Cook Political Report says Democrats could win as many as 240 House seats, potentially their largest majority since Barack Obama’s first year as president.Axios: “The number of House seats Democrats could win under the upper end of Cook Political Report's forecast — potentially their largest majority since the first year of Barack Obama's presidency.”
- SupportedKalshi gives Democrats a 73% probability of winning both chambers, and nearly $100 million in contracts have traded on its congressional-control market.Axios: “73%: The probability of Democrats winning both chambers of Congress, according to Kalshi. ... Nearly $100 million in contracts have traded on Kalshi's congressional control market alone.”
- SupportedThe final AtlasIntel generic ballot shows Democrats leading by 14 points.Axios: “+14: Democrats' lead on the generic congressional ballot in the final poll from AtlasIntel”
- SupportedNate Cohn warned white Democrats were about 30% more likely than white Republicans to respond to the final Times/Siena surveys, a slightly wider gap than in 2020, when polls overstated Democratic support.Axios: “New York Times polling chief Nate Cohn warned that white Democrats were roughly 30% more likely than white Republicans to respond to the final Times/Siena surveys — a slightly wider gap than in 2020, when polls overstated Democratic support.”
- SupportedThe Washington Post found Adam Hamilton leading Roger Marshall by nine points in Kansas, where registered Democrats were more than twice as likely as Republicans to participate.Axios: “Washington Post pollsters raised similar alarms after finding Democrat Adam Hamilton leading Republican Sen. Roger Marshall by nine points in Kansas, where registered Democrats were more than twice as likely as Republicans to participate.”
- SupportedMike Johnson said Monday, “They’re trying to create this idea of a blue wave and they’re using the poll numbers to do it.”Axios: “"They're trying to create this idea of a blue wave and they're using the poll numbers to do it," Johnson said Monday”