South Carolina GOP Special Election Tests Succession Strategy for Lindsey Graham’s Seat

Republicans in South Carolina cast ballots on Tuesday in a special election designed to fill the US Senate vacancy left by the death of Senator Lindsey Graham. The vote determines the Republican nominee who will face Democratic candidate Annie Andrews in the November midterm general election. The contest follows Graham’s death from cardiovascular disease on July 11, which triggered a legal requirement for a new primary under state law after the initial winner vacated the race.

The Republican field comprises ten candidates, including Graham’s sister, Darline Graham, who was appointed by outgoing Governor Henry McMaster to serve as interim senator until January. According to a Quantus Insights poll, Darline Graham holds a commanding lead with 30.4 per cent support. She is followed by US Representative Ralph Norman at 17.5 per cent, Congressman Russell Fry at 16.6 per cent, and former Governor Mark Sanford at 15.4 per cent. Other contenders include businessman Mark Lynch, who finished second in the original June primary, alongside several local officials and professionals.

Darline Graham, a former public administrator, is positioned as a continuity candidate likely to uphold her late brother’s hawkish foreign policy platform. Her candidacy received a significant boost from an endorsement by President Donald Trump, a longstanding ally of Lindsey Graham. However, political analysts note that her lack of prior legislative experience may present vulnerabilities in the general election, despite her current polling advantage.

The Democratic nominee, paediatrician Annie Andrews, has framed the race as an opportunity for change in the red-leaning state. Andrews has capitalised on a measles outbreak in South Carolina that began in October 2025 to criticise Republican leadership and Health and Human Services Secretary Robert F Kennedy Jr. She has positioned herself as a generational shift in leadership, appealing to voters seeking alternatives to the current administration’s health policies.

While a Republican remains the favourite to retain the seat, Graham’s death has altered the political landscape. The outcome of this special election will set the stage for a high-stakes November contest, with the winner inheriting the legacy of a senator who served for 23 years and was known for advocating military intervention in regions such as Iran and Iraq.