Democrats are gaining ground in prediction-market forecasts for the Nov. 3 midterm elections, with Kalshi assigning them a 61% chance of taking the Senate and a 91% chance of winning the House. Kalshi bettors put the probability of a Democratic sweep at 62%, up from 46.5% a month earlier. Polymarket, a Polygon-based prediction market, gave Democrats 66% odds of controlling both chambers, with 93% odds for the House and 66% for the Senate. Republicans currently hold a 53–47 Senate majority and control the House 218–214, with one independent and two vacancies.