Polymarket$3.18BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$401.77MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$25.30MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Today
If the Republican Party wins the 2026 Pennsylvania State Senate election, then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Who will win the 2026 Pennsylvania State Senate election? are: Republican party: 57%, Democratic party: 38%. These probabilities are derived from real-money trading and update in real time.
Who will win the 2026 Pennsylvania State Senate election? is currently available on Kalshi. Check PredictMarketCap for cross-platform availability as new markets are added regularly.
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.
