Republicans ’ chances of retaining control of the Senate have risen on prediction markets in the past couple of weeks, reflecting shifting expectations around the 2026 midterms . Prediction markets have moved noticeably in Republicans’ favor since last month, marking a reversal from earlier expectations that Democrats were better positioned to take back the chamber. On U.S.-regulated platform Kalshi, GOP odds to hold the Senate have climbed to 58 percent at the time of writing, a roughly 10‑