Will the Republican Party hold exactly 50 Senate seats after the 2026 midterm elections?

This market prices a 14% probability of Republicans holding exactly 50 seats post-2026, reflecting the narrow outcome where they'd need Vice Presidential tiebreaker control—a relatively unlikely scenario given historical seat distributions typically cluster around 48-52 for the majority party. The $71.13 daily volume against $20.3M open interest indicates thin liquidity relative to market size, with a 3¢ spread suggesting modest trading activity for a binary outcome on a major political event. The flat 7-day price action and neutral regime score (0.341) suggest the market has settled into equilibrium without recent catalysts, though the November 2026 resolution date still provides ample time for political developments to shift positioning.

Resolution rules

The 2026 midterm elections are scheduled to be held on November 3, 2026. This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections. This market will resolve based on the results of all Senate elections, including special elections, that are scheduled to occur in November 2026 as of October 31, 2026. If a required runoff for any such election could change the market’s outcome, the market will remain open until that runoff is conclusively called by this market’s resolution sources. If a Senate seat is vacant but a corresponding election is not held in November 2026, the seat will be considered held by the party of the seat's most recent incumbent. A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 Senate elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democratic or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the Senate elections are conclusively called by this market's resolution sources. The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all Senate elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on the official certification.

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