Resolution criteria

The market resolves YES if Republicans maintain a majority in the U.S. Senate after the 2026 midterm elections on November 3, 2026. Currently, Republicans hold 53 seats and Democrats hold 47 (including two independents), with 35 seats up for election—22 held by Republicans and 13 by Democrats. Republicans can lose only two seats and retain a majority. Resolution will be determined by the official results certified by the Senate following the November 3, 2026 elections, including two special elections in Florida and Ohio.

Background

Republicans gained majority control of the Senate in the 2024 elections by flipping four Democratic seats. As of March 2026, eleven senators—four Democrats and seven Republicans—have announced they will not seek reelection, the most in a single election cycle. Two Democratic-held seats, Georgia and Michigan, are in states won by Donald Trump in the previous presidential election, while Maine is the only Republican-held seat in a state won by Kamala Harris.

Considerations

Democrats will likely be boosted by favorable national headwinds, as midterms usually provide fertile ground for the party out of the White House. However, Democrats will need to flip four seats to take a 51–49 seat majority (a 50-50 tie would be broken by Vice President JD Vance).

Parts of this description was generated by AI.