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Politics·Derivatives

2026 U.S. House election: Republicans flip the Democrats by...?

Market icon
Politics·Derivatives

2026 U.S. House election: Republicans flip the Democrats by...?

Mar 31

Mar 31

Nov 3

Mar 31

Mar 31

Nov 3

$50,112 Vol.

Mar 31, 2026
Polymarket

$50,112 Vol.

Polymarket

March 31

$25,653 Vol.

<1%

This market will resolve to “Yes” if, between the Republican Party and the Democratic Party, the Republican Party becomes the favorite in the "Which party will win the House in 2026?" market (https://polymarket.com/event/which-party-will-win-the-house-in-2026?tid=1764045739181) for any four-hour period ending by March 31, 2026, 11:59 PM ET or earlier. Otherwise, this market will resolve to “No”. The Republican Party will be considered to have become the favorite for any four-hour period if it is ahead of the Democratic Party in more individual minutes than the Democratic Party is ahead of the Republican Party during a qualifying time period. A tie in the number of minutes will not qualify. The resolution source will be the underlying minute-level price data for the “Which party will win the House in 2026?” market, which can be viewed using the bar chart on https://derivative.polymarket.com/index/will-the-republicans-flip-the-democrats-for-the-2026-us-house-elections-by or through the “Resolution” tab with the time set to show the four-hour window. Both interfaces display the same underlying data. Note: This market will resolve according to the price scoring methodology of derivative.polymarket.com.This market will resolve to “Yes” if, between the Republican Party and the Democratic Party, the Republican Party becomes the favorite in the "Which party will win the House in 2026?" market (https://polymarket.com/event/which-party-will-win-the-house-in-2026?tid=1764045739181) for any four-hour period ending by December 31, 2025, 11:59 PM ET or earlier. Otherwise, this market will resolve to “No”. The Republican Party will be considered to have become the favorite for any four-hour period if it is ahead of the Democratic Party in more individual minutes than the Democratic Party is ahead of the Republican Party during a qualifying time period. A tie in the number of minutes will not qualify. The resolution source will be the underlying minute-level price data for the “Which party will win the House in 2026?” market, which can be viewed using the bar chart on https://derivative.polymarket.com/index/will-the-republicans-flip-the-democrats-for-the-2026-us-house-elections-by or through the “Resolution” tab with the time set to show the four-hour window. Both interfaces display the same underlying data. Note: This market will resolve according to the price scoring methodology of derivative.polymarket.com.

This market will resolve to “Yes” if, between the Republican Party and the Democratic Party, the Republican Party becomes the favorite in the "Which party will win the House in 2026?" market (https://polymarket.com/event/which-party-will-win-the-house-in-2026?tid=1764045739181) for any four-hour period ending by March 31, 2026, 11:59 PM ET or earlier. Otherwise, this market will resolve to “No”.

The Republican Party will be considered to have become the favorite for any four-hour period if it is ahead of the Democratic Party in more individual minutes than the Democratic Party is ahead of the Republican Party during a qualifying time period.

A tie in the number of minutes will not qualify.

The resolution source will be the underlying minute-level price data for the “Which party will win the House in 2026?” market, which can be viewed using the bar chart on https://derivative.polymarket.com/index/will-the-republicans-flip-the-democrats-for-the-2026-us-house-elections-by or through the “Resolution” tab with the time set to show the four-hour window. Both interfaces display the same underlying data.

Note: This market will resolve according to the price scoring methodology of derivative.polymarket.com.
Volume
$50,112
End Date
Mar 31, 2026
Market Opened
Dec 2, 2025, 1:01 PM ET

Resolver

0x65070BE91...
This market will resolve to “Yes” if, between the Republican Party and the Democratic Party, the Republican Party becomes the favorite in the "Which party will win the House in 2026?" market (https://polymarket.com/event/which-party-will-win-the-house-in-2026?tid=1764045739181) for any four-hour period ending by March 31, 2026, 11:59 PM ET or earlier. Otherwise, this market will resolve to “No”. The Republican Party will be considered to have become the favorite for any four-hour period if it is ahead of the Democratic Party in more individual minutes than the Democratic Party is ahead of the Republican Party during a qualifying time period. A tie in the number of minutes will not qualify. The resolution source will be the underlying minute-level price data for the “Which party will win the House in 2026?” market, which can be viewed using the bar chart on https://derivative.polymarket.com/index/will-the-republicans-flip-the-democrats-for-the-2026-us-house-elections-by or through the “Resolution” tab with the time set to show the four-hour window. Both interfaces display the same underlying data. Note: This market will resolve according to the price scoring methodology of derivative.polymarket.com.
This market will resolve to “Yes” if, between the Republican Party and the Democratic Party, the Republican Party becomes the favorite in the "Which party will win the House in 2026?" market (https://polymarket.com/event/which-party-will-win-the-house-in-2026?tid=1764045739181) for any four-hour period ending by March 31, 2026, 11:59 PM ET or earlier. Otherwise, this market will resolve to “No”. The Republican Party will be considered to have become the favorite for any four-hour period if it is ahead of the Democratic Party in more individual minutes than the Democratic Party is ahead of the Republican Party during a qualifying time period. A tie in the number of minutes will not qualify. The resolution source will be the underlying minute-level price data for the “Which party will win the House in 2026?” market, which can be viewed using the bar chart on https://derivative.polymarket.com/index/will-the-republicans-flip-the-democrats-for-the-2026-us-house-elections-by or through the “Resolution” tab with the time set to show the four-hour window. Both interfaces display the same underlying data. Note: This market will resolve according to the price scoring methodology of derivative.polymarket.com.This market will resolve to “Yes” if, between the Republican Party and the Democratic Party, the Republican Party becomes the favorite in the "Which party will win the House in 2026?" market (https://polymarket.com/event/which-party-will-win-the-house-in-2026?tid=1764045739181) for any four-hour period ending by December 31, 2025, 11:59 PM ET or earlier. Otherwise, this market will resolve to “No”. The Republican Party will be considered to have become the favorite for any four-hour period if it is ahead of the Democratic Party in more individual minutes than the Democratic Party is ahead of the Republican Party during a qualifying time period. A tie in the number of minutes will not qualify. The resolution source will be the underlying minute-level price data for the “Which party will win the House in 2026?” market, which can be viewed using the bar chart on https://derivative.polymarket.com/index/will-the-republicans-flip-the-democrats-for-the-2026-us-house-elections-by or through the “Resolution” tab with the time set to show the four-hour window. Both interfaces display the same underlying data. Note: This market will resolve according to the price scoring methodology of derivative.polymarket.com.

Trader consensus on Republican net seat flips against Democrats in the 2026 U.S. House elections prices in heavy influence from the impending 2024 presidential outcome, where midterms historically punish the incumbent president's party by an average of 25 House seats. Recent polls showing Donald Trump leading in key battlegrounds have tempered expectations for major GOP gains, as a Republican White House would favor Democratic pickups. Vulnerable Democratic-held districts in California and New York see early challengers emerge amid 10+ retirements announced since summer. Upcoming catalysts include November 5, 2024, election certification, 2025 redistricting challenges, and January 2026 filing deadlines for primaries.

Experimental AI-generated summary referencing Polymarket data · Updated

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Will the Democratic Party win the popular vote in the 2026 U.S. House of Representatives midterm elections by between 8% and 10%?

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Frequently Asked Questions

"2026 U.S. House election: Republicans flip the Democrats by...?" is a prediction market on Polymarket with 2 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "March 31" at 0%, followed by "December 31" at 0%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 0¢ implies that the market collectively assigns a 0% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "2026 U.S. House election: Republicans flip the Democrats by...?" has generated $50.1K in total trading volume since the market launched on Dec 2, 2025. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "2026 U.S. House election: Republicans flip the Democrats by...?," browse the 2 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

This is a wide-open market. The current leader for "2026 U.S. House election: Republicans flip the Democrats by...?" is "March 31" at just 0%, with "December 31" close behind at 0%. With no outcome commanding a strong majority, traders see this as highly uncertain, which can present unique trading opportunities. These odds update in real-time, so bookmark this page to watch how the probabilities evolve.

The resolution rules for "2026 U.S. House election: Republicans flip the Democrats by...?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.