The closely matched probabilities across turnout ranges for South Carolina's November 3, 2026, Senate general election reflect uncertainty over midterm voter participation in a state rated safe or likely Republican by multiple forecasters. The Democratic primary produced nominee Annie Andrews with modest participation, while the Republican special primary and upcoming August 25 runoff have featured low early engagement, consistent with historical patterns where off-year elections draw fewer voters than presidential cycles. Factors that could shift totals include the intensity of get-out-the-vote efforts by both parties, early and absentee ballot volumes, and any national political developments that increase or suppress enthusiasm in this solidly partisan environment.