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 House member sworn in for PA-17 for the term beginning in 2027 is a member of the Republican Party, then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Will Democratic win the House race for PA-17? are: Democratic party: 86%, Republican party: 17%. These probabilities are derived from real-money trading and update in real time.
Will Democratic win the House race for PA-17? 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.
