Darline Graham, the interim South Carolina Senator, has taken a commanding lead in the race to succeed her late brother Lindsey Graham as the state’s GOP Senate nominee. A recent Quantus Insights poll indicates she holds a double-digit advantage over her closest rivals. Conducted from August 5 to 6, the poll published before the August 11 special primary shows Graham leading with 30.4% support. Her contenders include Representative Ralph Norman at 17.5%, Representative Russell Fry at 16.6%, and former Governor Mark Sanford at 15.4%. Approximately 11.7% of voters remain undecided.
When undecided voters are allocated their preferences, Graham’s support climbs to 33.1%. Norman reaches 20.4%, Fry 19.6%, and Sanford 17.4%. Attempts to reach Norman’s and Fry’s campaigns for comment went to email on Saturday, with a message left for Graham’s office.
August 11 Special Primary Context
The August 11 special primary in South Carolina arises following Lindsey Graham’s unexpected passing on July 11. The medical examiner attributed his death to an ‘aortic dissection’ due to cardiovascular issues. Ten Republican contenders vie for the nomination:
- Darline Graham: Trump-endorsed interim senator and Lindsey Graham’s sister.
- Ralph Norman: Conservative congressman from the 5th District.
- Russell Fry: Congressman from the 7th District.
- Mark Sanford: Former governor aiming for a political return.
- Mark Lynch: Businessman with prior Senate aspirations.
- Duke Buckner: Attorney and educator presenting as a conservative outsider.
- Glenda Gail Parker: Retired Air Force officer focused on the cost of living.
- Danny Ford II: Farmer concentrating on government accountability.
- Mark McBride: Former Myrtle Beach mayor and repeat federal candidate.
- Sam Shepherd: Biomedical engineer and entrepreneur.
Graham’s Candidacy and Trump’s Endorsement
Despite lacking a history in electoral politics, Graham benefits from substantial support following an endorsement by former President Donald Trump. Trump commended Graham via Truth Social, referencing their long-standing connection and her patriotic disposition. He assured voters of her commitment to the state’s interests and urged her candidacy to honor Lindsey Graham’s legacy.
The Quantus Insights poll has delivered Graham’s strongest performance yet. In an Emerson College survey conducted between July 28 and 29, Norman led slightly with 22%, Graham at 19%, and Fry at 12%. Resonance Media Services presented Graham leading with 20.8% against Norman’s 16.9%.
Prediction Markets Analysis
Prediction markets reveal stronger confidence in Graham than some traditional polls. Polymarket bets give Graham a 65% probability of winning the primary. Norman follows with 21% and Fry with 9%. On Kalshi, Graham holds a 47% likelihood to secure the overall Republican primary, contrasted with Fry’s 27% and Norman’s 23%.
Upcoming Developments
As the August 11 special primary looms, Graham appears well-poised to claim the GOP nomination. Early voting wrapped up on Friday, with over 41,000 ballots submitted in two days, as reported by the State Election Commission. The primary marks a significant Republican event this summer, viewed as a reflection of Trump’s sway within South Carolina’s GOP following his endorsement of Graham.
Political Science Professor Gibbs Knotts from Coastal Carolina University remarked on the wider implications, highlighting potential impacts on the general election. ‘Republicans need to be cautious; while a Democratic win in South Carolina remains unlikely, internal division could harm the candidate’s prospects in November,’ Knotts advised.

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