The competitive South Carolina Senate race between Republican Darline Graham and Democrat Annie Andrews has tightened in recent polls, with margins often under five points following the July 2026 death of former Sen. Lindsey Graham and Darline Graham’s appointment and primary win. This dynamic has spurred heightened mobilization by both parties ahead of the November 3 general election, including a October 11 debate and early voting from October 19-31. Historical midterm turnout in the state has hovered near 1.7 million ballots, as in 2022, but the unusual closeness for this reliably Republican seat introduces uncertainty around participation rates among key demographics such as older voters and independents. Trader consensus on the 1.6M-2M brackets reflects expectations that these factors will produce turnout modestly above or aligned with recent midterms without dramatic spikes.