Republican candidates hold clear leads in all three 2026 Senate races, driving trader consensus toward a Republican sweep at 71.5%. In Mississippi, Cindy Hyde-Smith leads Scott Colom by roughly 6 points in available polling, consistent with the state's partisan lean. South Carolina's Darline Graham maintains a modest edge over Annie Andrews amid a narrower contest rated likely Republican. Montana's Kurt Alme holds double-digit advantages over Democratic and independent opponents in a safe Republican seat. These margins have remained stable in recent surveys with no major late shifts, reflecting limited Democratic paths in these states and positioning Republican control of all three as the dominant market outcome.