Prediction markets have shifted to favor Democrats to control the U.S. Senate after the 2026 midterms, marking the first time the party has taken the lead in the race's history. On Myriad Markets, owned by Decrypt's parent company, traders are pricing the chances of Democrats winning at about 50-50. This shift has been seen as a significant shift from the previous year's price tag of 18%. The change comes as the Senate had been expected to remain in Republican hands, despite the Senate map being considered structurally favorable to the GOP. The move suggests traders may be reassessing how geopolitical developments could influence the next election cycle.