President Donald Trump was unable to clear the field Tuesday for his choice to replace Sen. Lindsey Graham when the late South Carolina Republican's younger sister, Darline Graham, failed to win a clear majority in the GOP primary election. Graham, a 62-year-old vocational rehabilitation administrator, by mid-Tuesday evening, is certain to make the Aug. 25 runoff and will face one of two congressmen battling for the number two spot, either Russell Fry or Ralph Norman. The winner of that race will face pediatrician Annie Andrews, who won the Democratic nomination in June, in the November general election. Sen. Darline Graham speaks ahead of the special GOP primary to replace her late brother, Sen. Lindsey Graham, on Aug. 1, 2026, in Lexington, South Carolina. Unlike Lindsey Graham, whose political career began 34 years ago with a run for a South Carolina state legislative seat, Darline Graham's career began exactly four weeks ago, two days after her brother's death.