The closely contested South Carolina Senate race between Republican Darline Graham and Democrat Annie Andrews, with multiple late-September and early-October polls showing leads of one point or less among likely voters, is sustaining trader expectations for turnout in the 1.6M–2M range. Both campaigns and outside groups are ramping up get-out-the-vote operations, including Republican efforts tied to upcoming visits by President Trump and Senate leadership, while Democrats emphasize base mobilization in a state with historically polarized turnout patterns. Early voting begins October 19 ahead of the November 3 election, and the first debate occurs on October 11, factors that could further lift participation if enthusiasm holds. A decisive shift in polling or reduced investment by either side could compress or expand total ballots cast before Election Day.