Prediction markets shift toward Democrats in Senate and governor races
Prediction market contracts on Kalshi and Polymarket show Democrats leading in multiple Senate and governor races Republicans have historically held. Kalshi's Senate control market gives Republicans a 54% chance, down from roughly 60% in early July. Democrats now lead in Michigan, Alaska, and Ohio on Kalshi, while Texas is tied. In the North Carolina Senate race, Cooper stood at 92% on Kalshi and 91% on Polymarket as of Friday. Republicans also trail in Ohio and Iowa governor races.
These moves test whether prediction markets can price political shifts faster than traditional polling, or whether they amplify momentum that later reverses. Traders who sized positions on July GOP strength now face losses as contracts reprice. Kalshi, the state-level Senate hub is a showcase product meant to prove CFTC-regulated venues can beat offshore rivals on political liquidity.
Repeated misses on actual outcomes undermine that sales pitch to institutional desks. Polymarket's parallel pricing in North Carolina shows both platforms are exposed to the same sentiment skew. The platforms need November accuracy to justify their role as forecasting infrastructure, not reactive betting markets. Campaigns and media outlets increasingly cite these prices as signal, so blowout mispricing damages public credibility alongside trader returns.
Political prediction markets now operate under intensifying scrutiny after a similar Michigan miss this week, where Kalshi and Polymarket's near-certainty on the El-Sayed margin proved badly wrong.