Traders on prediction markets indicate that the chances of Democrats gaining control of the U.S. Senate have significantly improved ahead of the upcoming elections. As of mid-July 2026, speculators on Kalshi assign a 54% probability to a Democratic victory, with Polymarket showing an even higher likelihood at 59%. Historically, the Senate has been a more challenging target for Democrats, especially as Republicans currently hold 20 of the 33 seats available this November.
The Democrats face the tough task of flipping seats in states that supported former President Donald Trump by wide margins in 2024, including Alaska, Texas, and Ohio. Before the onset of the U.S.-Iran conflict in February, Republicans were projected to retain control of the Senate with about a 60% probability. However, fluctuations in gas prices and rising costs have adversely affected Trump’s approval ratings, contributing to a shift in market predictions.
Despite a brief recovery in Republican odds over the summer, current conditions have turned unfavorable for the GOP, particularly with surging U.S. oil prices exceeding $100 per barrel and national gasoline prices surpassing $4 a gallon. Recent polling data further corroborate the shifting landscape, with a New York Times/Siena University survey suggesting Democratic candidates lead Republicans by nearly 9 percentage points nationally.
Why this story matters
- The outcome of the Senate races could significantly impact legislative agendas.
Key takeaway
- Predictions indicate a tightening race, with increasing odds in favor of Democrats amid rising fuel prices affecting public sentiment.
Opposing viewpoint
- Republicans still control a considerable number of seats and could recover ground before the elections, particularly if economic conditions stabilize.
