Democrats now hold over 70 percent odds of winning back the US House of Representatives in the 2026 elections. Prediction markets show a strong Democratic advantage. However, Republicans are defending a slim majority and have seen some gains. A new map in Ohio could also benefit the Republican party. Traders remain confident in a Democratic shift.
The odds of Democrats regaining control of the US House of Representatives in the 2026 midterm elections have surged past 70 per cent, according to data from the prediction platform Polymarket on Wednesday morning.
As of Wednesday afternoon, the data looked similar; Democrats held a 68 per cent chance of winning, while Republicans trailed at 33 per cent, based on more than $190,000 in total trading volume. The prediction market, which allows users to buy and sell shares based on political outcomes, reflects real-time sentiment among traders.
The market, titled “Which party will win the House in 2026?” will resolve in favor of the party that controls more than half of the voting members of the US House following the November 3, 2026, elections. If the result remains unclear after the vote, the market will stay open until a new Speaker of the House is chosen.
Despite Democrats’ current lead in market odds, recent developments suggest the race remains competitive. According to Polymarket’s analysis, Republicans are defending a narrow majority and have gained some momentum amid a divided Democratic opposition. A newly approved congressional map in Ohio, which adds seats favoring Republicans, could further tilt the balance in their favor.
However, traders appear confident in a Democratic advantage, with a significant portion of bets pricing in a potential shift in control next year.
Polymarket noted that all predictions are “experimental” and that outcomes are based on final certified results or official determinations following the 2026 elections.
Polymarket is a decentralized prediction platform that uses blockchain technology to let users bet on real-world events, from elections to economic trends. It operates as a transparent, open market where participants buy and sell shares based on their predictions of different outcomes.
As trading unfolds, share prices fluctuate according to user sentiment, reflecting real-time probabilities of each event. This allows traders to both profit from accurate forecasts and gauge public expectations on major developments.
