Key Points
New South Carolina law requires Senate candidates to vote in two of last three Republican primaries.
Rep. Nancy Mace and GOP Chairman CJ Westfall question whether Darline Graham meets this requirement.
Graham filed official paperwork Friday to run in August 11 special primary after Trump endorsement.
Prediction markets gave Graham 68% chance of winning after her announcement.
South Carolina Republican leaders are challenging whether Darline Graham qualifies to run for her late brother’s Senate seat. Rep. Nancy Mace and state GOP Chairman CJ Westfall say Graham may not meet a new state election law requiring candidates to have voted in at least two of the last three Republican primaries. Graham, who was appointed to fill the remainder of Lindsey Graham’s term after his death in early July, filed official paperwork Friday to run in the August 11 special primary.
What the eligibility rule requires
South Carolina passed a new election law in July 2026 that requires Senate candidates to have voted in at least two of the last three Republican primary elections. Mace told Fox News Digital that it is unclear whether Graham meets this threshold. “It’s not clear that she’s voted in enough Republican primary elections to be on the ballot,” Mace said. Graham has never held elected office before and worked as a counselor, optician, and commissioner of the South Carolina Commission for the Blind since 2019.
Who is challenging her candidacy
Mace, a South Carolina Republican representative, publicly questioned Graham’s qualifications on July 25. Local GOP Chairman CJ Westfall said he is pursuing a formal determination of whether Graham meets party qualifications to run. Westfall’s request followed conversations with local voters about Graham’s lack of political experience and voting record. Mace has endorsed Rep. Ralph Norman instead, calling him “a tried-and-true conservative” with a 100% conservative voting record.
The special primary and timeline
Filing for the race opened July 21, with the special primary scheduled for August 11. The winner will face Democratic nominee Annie Andrews in the November general election. Graham announced her candidacy on Fox News after receiving Trump’s public endorsement. According to prediction markets on Kalshi, Graham was given a 68% chance of winning after her announcement, while Rep. Russell Fry dropped from 70% to 10%.
Graham’s path to the ballot
Gov. Henry McMaster appointed Darline Graham to fill the remainder of her brother’s term, which ends in January 2027. She has never held elected office but was a fixture in Lindsey Graham’s campaigns for decades. After their parents died when she was 13, Lindsey became her legal guardian and later adopted her. Trump publicly urged her to run, writing “I asked Darline, for the Good of our Nation, to run for the U.S. Senate in the Special Republican Primary.” Other candidates in the race include Rep. Russell Fry, former South Carolina Governor Mark Sanford, and Duke Buckner.
Final Thoughts
Graham’s ballot eligibility hinges on her voting record in recent Republican primaries, a question state GOP officials are formally reviewing before the August 11 primary. If she clears this hurdle, prediction markets suggest she holds a commanding lead over other Republican candidates.
FAQs
Candidates must have voted in at least two of the last three Republican primary elections under the July 2026 state election law.
Mace said it is unclear whether Graham voted in enough Republican primaries to meet the two-of-three requirement.
Gov. Henry McMaster appointed her to fill the remainder of Lindsey Graham’s term after his death in early July.
The special primary is scheduled for August 11, 2026, with the winner facing Democrat Annie Andrews in November.
Disclaimer:
The content shared by Meyka AI PTY LTD is solely for research and informational purposes. Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.
About Author

Danny Kontos
Co FounderDanny Kontos has been a stock investor since 2007 and co-founded Meyka in 2023. He keeps a small, focused portfolio and only moves when the numbers are hard to argue with. He has waited years on a single position before. Before Meyka, he ran a web hosting company and a mortgage lending platform, so he knows what a well-run business actually looks like under the hood. This article did not come from a news cycle. It came from someone who has been watching this space for a long time.
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