2026 U.S. Senate Election: Democrats flip Republicans by March 31?

Foretrace AI research

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24h volumeUnavailable

Total volumeUnavailable

LiquidityUnavailable

Event end date · UTCMar 31, 2026

Price history

Market probability

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Polymarket · UTC

Sampled market observations, not AI forecasts. Lines connect available observations. Legend values are current provider quotes; chart points may be older.

Outcomes & resolution rules

1 market

These are market-implied probabilities, not AI forecasts. A displayed quote may differ from the price available for your order.

ClosedMarket odds100%

2026 U.S. Senate Election: Democrats flip Republicans by March 31?

Yes100%Polymarket estimate

No0%Polymarket estimate

Liquidity: Unavailable
Deadline · UTC: Mar 31, 2026
Yes bid / ask: 99.9¢ / 100.0¢
Trading fees: Not flagged by provider

Closed market · historical data

This market is closed. Its historical data remains available.

How research works

Resolution rules

This market will resolve to “Yes” if, between the Democratic Party and the Republican Party, the Democratic Party becomes the favorite in the "Which party will win the Senate in 2026?" market (https://polymarket.com/event/which-party-will-win-the-senate-in-2026?tid=1764796601244) for any four-hour period ending by March 31, 2026, 11:59 PM ET or earlier. Otherwise, this market will resolve to “No”. The Democratic Party will be considered to have become the favorite for any four-hour period if it is ahead of the Republican Party in more individual minutes than the Republican Party is ahead of the Democratic 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 Senate in 2026?” market, which can be viewed using the bar chart on https://derivative.polymarket.com/index/2026-us-senate-election-democrats-flip-republicans-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.