Will Republicans win the U.S. Senate in 2026?

As of March 21, 2026, the Kalshi odds for Will Republicans win the U.S. Senate in 2026? are: Republican Party: 51%, Democratic Party: 49%. These probabilities are derived from real-money trading and update in real time.

Will Republicans win the U.S. Senate in 2026? is currently available on Kalshi. It is also available on Polymarket — compare odds across both platforms on our cross-platform comparison page.

Prediction market odds reflect the aggregate opinion of traders who risk real money on outcomes. The price of a share (e.g., 65¢) represents the market's implied probability (65%). Prices move as traders buy and sell based on new information, polls, and analysis.