Will the Democratic Party win the popular vote in the 2026 U.S. House of Representatives midterm elections by between 12% and 14%?
Odds, price jumps explained, and what could move it next
Yes at 5% on 7 Nov 2026, down 11 pts over the previous 7 days. 4 big jumps since 4 Nov 2026, listed below.
Data from Polymarket. Numbered dots are the jumps explained below.
Context
This prediction market asks whether the Democratic Party will win the popular vote in the 2026 U.S. House of Representatives midterm elections by a margin of between 12% and 14%. The market resolves based on the official vote totals published by the U.S. Clerk of the House, looking at the absolute difference between the percentage of valid votes cast for Democratic candidates and Republican candidates.
Following the November 3, 2026 midterm elections, early analysis and reports indicate that Democrats achieved substantial wins across various races, flipping over 40 House seats and exceeding initial polling margins. Outlets like NBC News, AP News, and Reuters are currently tracking detailed charts, maps, and final vote tallies to illustrate the scope of the Democratic wave.
The official outcome will rely on complete tallies published by the U.S. Clerk of the House following the November 3, 2026 election, with the market closing prior to final resolution. Observers and analysts are reviewing the broad electoral shifts and close individual races, such as the 4th Congressional District, to understand the broader impact of the midterm results.
Sources: Fingerlakes1.com: Early 2026 election analysis finds polls understated Democratic margins, CBS News: Democrats have now flipped over 40 House seats. Here are all the districts that changed control in the midterms., NBC News: 7 charts that illustrate the scope of Democrats’ big 2026 wave, AP News: 2026 U.S. House Election Results, Reuters: US midterm results in maps and charts
Written by AI from the linked news sources and checked automatically, not by a person.
What could move it next
No upcoming events listed for this market yet.
Price jumps explained
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6 Nov 2026
Democrats Win Large House Majority in Midterm Elections
The chance of the Democratic Party winning the popular vote by between 12% and 14% dropped as election data indicated a larger Democratic House majority than that bracket. News reports highlighted that Democrats won the largest House majority since 2008 following a national sweep.
Sources: The New York Times: 2026 Midterms Data: How Democrats Won the Largest House Majority Since 2008, Inside Climate News: After Democrats’ National Sweep, Republicans Maintain a Weaker Grip on Florida
After 24 h: held. After 7 days: too early.
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6 Nov 2026
Democrats Secure Massive Midterm Victory in House Races
As election results came in, reports showed that the Democratic Party achieved a historically large majority and popular vote rout in the House of Representatives. Articles noted that pollsters underestimated the size of the Democratic blue wave, which pushed vote margins well beyond the 12% to 14% range.
Sources: Yahoo: Democrats' 2026 midterm rout was big — really big. Here are the numbers that prove it., CNN: Democrats’ House majority is trending toward historic, Financial Times: Why pollsters underestimated the size of the Democrats’ US midterm ‘blue wave’, The New York Times: Midterm Elections Live Updates: Democrats Clear 250 House Seats in Decisive Power Shift, The New York Times: 2026 Midterms Data: How Democrats Won the Largest House Majority Since 2008
After 24 h: held. After 7 days: too early.
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5 Nov 2026
Democrats See Gains in 2026 House Midterm Elections
As election results came in, reports highlighted significant Democratic momentum and victories in U.S. House races across multiple states. Analysts pointed to a widespread voter push toward the Democratic Party, driving up its national vote margins.
Sources: Kansas Reflector: Kansas Democrats in line to pick up 20 seats in House, wipe out Republican supermajority, ABC13 Houston: Repudiation of Trump, economic pain drove Democrats to victory in the House: Voter Poll analysis, Iowa Capital Dispatch: Iowa Republicans’ legislative majorities shrink in 2026 elections, The Conversation: Polls understated Democrat vote in landslide repudiation of Donald Trump, Silver Bulletin: After an extraordinary wave, what comes next?, Utah News Dispatch: ‘Blue tsunami’ hits Utah: House Republicans on pace to lose 17 seats, breaking supermajority
After 24 h: reverted. After 7 days: too early.
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4 Nov 2026
Democrats Win House Control in Midterms
The chance of the Democratic Party winning the House popular vote by between 12% and 14% surged after election results indicated a strong performance by Democrats. News reports published following the election noted that Democrats captured control of both chambers of Congress during the 2026 midterm elections.
Sources: Al Jazeera: Democrats win control of House and Senate: Key US midterms takeaways, WPXI: Election 2026: Democrats capture both chambers of Congress
After 24 h: held. After 7 days: too early.
Written by AI from the linked news sources and checked automatically, not by a person.
Other markets in “2026 Midterms: House Popular Vote Margin of Victory”
Questions about this market
What are the odds for “Will the Democratic Party win the popular vote in the 2026 U.S. House of Representatives midterm elections by between 12% and 14%”?
On 7 Nov 2026, Polymarket traders priced Yes at 5%, which means they saw about a 5 in 100 chance. That was down 11 points over the previous 7 days. The live price is shown in the chart at the top of this page.
Why did the odds move recently?
The latest explained move was on 6 Nov 2026, from 43% to 21%: Democrats Win Large House Majority in Midterm Elections. The chance of the Democratic Party winning the popular vote by between 12% and 14% dropped as election data indicated a larger Democratic House majority than that bracket. Every big move is listed under “Price jumps explained” (this one is number 4).
Do big jumps in this market usually hold?
Of the 4 big jumps old enough to check, 3 held after 24 hours (kept at least 70% of the move). The rest partly or fully reverted.
How does this market resolve?
This market will resolve according to the popular vote margin of victory between the Democratic Party and the Republican Party in the US House of Representatives midterm elections, scheduled for November 3, 2026. If the reported value falls exactly between two brackets, then this market will resolve to the higher range bracket. The full Polymarket rules are at the bottom of this page.
Can I bet on this market on predictionwave?
No. predictionwave only explains the odds. The market itself runs on Polymarket, and trading there is not allowed in every country.
How this market resolves (Polymarket rules)
This market will resolve according to the popular vote margin of victory between the Democratic Party and the Republican Party in the US House of Representatives midterm elections, scheduled for November 3, 2026. For the purpose of this market, the “popular vote margin of victory” is defined as the absolute difference between the percentage of valid votes cast for all Democratic Party House candidates and the percentage of valid votes cast for all Republican Party House candidates in this election. The percentage of the valid votes cast for each party’s House candidates will be determined by dividing the total number of valid votes that party’s House candidates receive by the sum of all valid votes cast for U.S. House candidates in the election. Only votes cast for candidates for U.S. Representative (voting members of the House of Representatives from districts in the 50 states) will be considered; votes for Delegates and the Resident Commissioner will not be considered. If the reported value falls exactly between two brackets, then this market will resolve to the higher range bracket. This market will resolve based on the vote totals as published by the US Clerk of the House. Any recount included in the Clerk of the House’s publication will be considered. If the US House of Representatives midterm elections do not take place by June 30, 2027, 11:59 PM ET, this market will resolve to "Other". The resolution source for this market will be the 2026 midterm election results published by the US Clerk of the House (https://history.house.gov/Institution/Election-Statistics/). If the 2026 midterm elections take place, and the Clerk of the House does not publish the results of this election by June 30, 2027, 11:59 PM ET, another credible resolution source may be chosen.