Polymarket$3.29BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$404.59MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$27.64MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Today
If Madison Sheahan wins the nomination for the Republican Party to contest the 2026 OH-09 House seat, then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Will Alea Nadeem be the Republican nominee for OH-09? are: Derek Merrin: 37%, Alea Nadeem: 22%, Madison Sheahan: 18%, Josh Williams: 4%. These probabilities are derived from real-money trading and update in real time.
Will Alea Nadeem be the Republican nominee for OH-09? 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.
