South Carolina Republicans head to the polls today to choose a nominee for the U.S. Senate seat left vacant by the death of longtime Senator Lindsey Graham in July. Nine candidates are competing in the special Republican primary, with Trump-backed Senator Darline Graham Nordone — the late senator's sister — emerging as the front-runner.

Graham Nordone, who was appointed by Governor Henry McMaster to temporarily fill the seat after her brother's death from an aortic dissection, received President Trump's endorsement just days before she entered the race. In his Truth Social post on July 19, Trump wrote: "I asked Darline, for the Good of our Nation, to run for the U.S. Senate in the Special Republican Primary on Tuesday, August 11, 2026."

The Test of Name Recognition

The race presents a unique challenge for Graham Nordone: leveraging a famous political name while having virtually no elected experience of her own. The late Lindsey Graham served in the Senate since 2003 and was a fixture in South Carolina politics for decades. His sister now hopes that family loyalty and Trump's backing will carry her through a crowded field.

Early voting began on August 6, giving voters a four-day window ahead of today's primary. If no candidate secures a majority, the top two finishers will advance to an August 25 runoff.

Compressed Timeline

The special primary operates on an accelerated calendar designed to fill the seat quickly. Candidates filed between July 21 and July 28 — just two weeks after Graham's death — and the winner of today's primary will face Democratic pediatrician Annie Andrews in the November 3 general election.

The rapid timeline favored candidates with existing name recognition and political infrastructure. Graham Nordone's appointment to the Senate gave her instant visibility and Trump's imprimatur, advantages that proved difficult for challengers to overcome in the abbreviated campaign period.

National Implications

While South Carolina is considered safe Republican territory, the race carries significance for the broader midterm landscape. Republicans are defending narrow Senate majorities and cannot afford unexpected losses. A Graham Nordone victory would signal Trump's continued influence in GOP primaries, while an upset could embolden challengers in other races.

The special primary is separate from the regular November election, which will determine who serves the final weeks of Graham's term through early January. The winner of today's primary will appear on the November ballot seeking a full six-year term beginning in 2027.

Polls close at 7 p.m. Eastern Time, with results expected throughout the evening.