US midterm elections 2026 are getting closer and prediction markets are pointing to a major shift in the balance of power in Congress. Polymarket’s latest figures show traders giving Democrats a 93% chance of taking the House and a 63% chance of taking the Senate. These are market-implied odds, not election results or guarantees, and they can change as trading moves.
The latest numbers were updated on September 28, 2026, with 33 days remaining until the election. The House market had about $13 million in trading volume, while the Senate market had about $5 million, as per a report by Polymarket.
