Polymarket Sets 50% Probability for Democratic Control of Both Chambers in 2026 Midterms

Prediction market data shows Democrats hold a 50% chance of controlling both Senate and House, compared to 38% for split control and 12% for full Republican control.

Woofun AI data shows that Polymarket's prediction event for the 2026 U.S. Midterms currently prices the probability of Democratic control over both the Senate and House at 50%. The market estimates a 38% likelihood of Republicans controlling the Senate while Democrats hold the House, and a 12% chance of Republicans controlling both chambers.

Settlement will depend on which party secures a majority of seats in each chamber after the November 3, 2026 vote. If no party achieves a majority, the party holding half the voting seats plus the Vice Presidency is deemed to control the Senate. Tether senior executive Jesse Spiro previously noted that these midterms could reshape the congressional political landscape, potentially impacting regulatory progress achieved by the crypto industry in Washington over the past two years.