Mark Sanford jumps into crowded South Carolina Senate primary despite Trump's endorsement of Darline Graham

Former South Carolina Gov. Mark Sanford launched a Senate bid this week, joining a growing Republican field that has ignored President Trump's endorsement of the late Sen. Lindsey Graham's sister for the open seat.

Sanford, a former congressman and one-time Trump critic, announced his candidacy Thursday with a launch video and a post on X, framing his run almost entirely around the national debt. He did not mention Trump in either his video or his social media announcement, a pointed omission in a race where every other major Republican candidate has tried to position himself as the president's closest ally.

The race to fill the late Lindsey Graham's South Carolina Senate seat now features at least five declared Republican candidates, despite Trump's "complete and total endorsement" of Darline Graham, the senator's sister, who was appointed to the seat just last week and sworn in at the U.S. Capitol on July 14. The special Republican primary is set for Aug. 11, with a runoff on Aug. 25 if no candidate clears 50 percent.

Sanford pitches fiscal conservatism while rivals compete for Trump's favor

Sanford's entry reshapes the contest. He served three terms in the U.S. House during the 1990s, won the governor's mansion in 2002, and was re-elected in 2006. A 2009 extramarital affair derailed his political career, but he mounted a comeback in 2012, winning his old congressional seat and serving three more terms. He lost that seat after Trump backed a primary challenger against him in 2018, Newsmax reported, and launched an unsuccessful presidential primary challenge against Trump in 2020.

None of that history appeared in Sanford's announcement. Instead, he focused on spending.

In his X post, Sanford wrote: "Our country is at a financial tipping point, and I can't sit on the sidelines while Washington adds a trillion dollars to the debt every 100 days. I'm worried for our children because, for the first time, America is borrowing from the future faster than we're building it."

His launch video struck the same note. "We're at a tipping point, and that's why I've decided to run for the U.S. Senate," Sanford said. "I'd ask that you look at my record in Congress and as governor in watching out for your family's future."

The contrast with the rest of the field is stark. Rep. Russell Fry, a two-term congressman who announced his Senate run Monday, built his entire pitch around proximity to the president. In a social media post featuring photos of himself alongside Trump, Fry declared:

"South Carolina doesn't need just another senator. It needs President Trump's strongest ally in the United States Senate. Make no mistake: I will be President Trump's favorite U.S. Senator, and you will have a MAGA fighter you can count on."

Fry described himself as a "MAGA warrior" in an accompanying video. That kind of language has become standard in this primary, a race where Trump has already made his preference known, and where candidates are competing not on policy differences but on who can pledge the most loyalty to the president.

Ralph Norman picks up endorsements from Trump allies who broke with the president's pick

Rep. Ralph Norman announced his Senate bid over the weekend, positioning himself as both a Trump supporter and a champion of Lindsey Graham's legacy. "I'm running to represent the people of South Carolina in the U.S. Senate because we need a fighter who will stand with President Trump and carry on Lindsey Graham's legacy," Norman said. He also pushed a specific legislative goal: "I want to get the SAVE America Act passed in the Senate!", a reference to Trump's election reform bill, which the president has called a top legislative priority.

Norman has picked up endorsements that complicate the race for Darline Graham. Sens. Mike Lee of Utah and Rick Scott of Florida, both staunch Trump allies, endorsed Norman over Trump's preferred candidate. Retiring Rep. Nancy Mace, who announced Monday she would not run for the seat herself, also backed Norman. And Fox News Digital reported that Turning Point USA's political arm endorsed Norman as well.

That two sitting senators aligned with Trump on virtually every major issue chose to break with his endorsement in this race says something about how Republican elected officials view the dynamics in South Carolina. Senate seats in the state open rarely. When they do, ambitious politicians move, regardless of who the president is backing.

Norman also ran unsuccessfully for the GOP gubernatorial nomination earlier this year, seeking to succeed term-limited Gov. Henry McMaster. His Senate bid represents a quick pivot to the next available opportunity. The pattern is familiar in Republican politics, where Trump's endorsement sometimes clears the field and sometimes does not.

Darline Graham carries Trump's backing but no elected track record

Darline Graham, also identified in official records as Darline Graham Nordone, announced her candidacy Monday on Fox News' "Hannity," days after meeting with Trump at the White House. The president gave her his "complete and total endorsement" and encouraged her to run for a full six-year term.

She has backing from Senate leadership. Senate Majority Whip John Barrasso of Wyoming offered a direct endorsement, telling reporters: "Darline Graham is an excellent senator. She'll continue to be an excellent senator, and she has my full support."

Senate Majority Leader John Thune of South Dakota was more measured. He called Graham a "strong candidate" and said, "She has a right, like everybody else, to get in that race." Asked about her lack of elected experience, Thune noted she was "very accomplished in her own life", a polite way of acknowledging the gap without dwelling on it. Thune said he was staying out of the race "for now."

Graham's candidacy rests on two pillars: the Trump endorsement and her brother's legacy. The late Sen. Lindsey Graham won the 2026 GOP Senate primary just last month by nearly 30 points over businessman Mark Lynch. Lynch has since announced he will take another shot at the Republican nomination in the special primary, a signal that even a decisive loss did not deter him from trying again.

The field now includes at least nine candidates, the New York Post reported, ranging from Trump's endorsed pick to a former governor who once ran against the president for the White House. The Democratic nominee, Annie Andrews, awaits the winner, though in a solidly red state like South Carolina, the real contest is the Republican primary.

Republican strategist: 'No downside for running'

Ryan Williams, a veteran Republican strategist, told Fox News Digital that the crowded field reflects political reality more than any weakness in Trump's endorsement.

"The Trump endorsement is a major boost for any candidacy, but it doesn't necessarily give you a lock on the seat."

Williams pointed to the rarity of the opportunity. "Senate seats in South Carolina do not come up very often, and politics is all about timing. You've got to seize the opportunity when it presents itself," he said. For sitting House members like Norman and Fry, the calculus is simple. "There's no downside for running. They're going to run as Trump Republicans, and they're going to flatter the president on the campaign trail."

That analysis captures the odd dynamic of this race. Multiple candidates are running against Trump's endorsed pick while simultaneously claiming to be Trump's strongest supporters. Norman and Fry each frame their candidacy as a service to the president's agenda. Even their endorsers, Lee, Scott, Mace, are Trump allies who simply prefer a different horse in this particular race.

The exception is Sanford, who has a documented history of clashing with Trump and who conspicuously avoided the president's name in his announcement. Whether that approach appeals to South Carolina Republican primary voters, who gave Lindsey Graham a nearly 30-point victory just weeks ago, remains an open question. The broader dynamics of intra-Republican competition have played out in recent congressional standoffs over spending and legislative priorities.

Aug. 11 primary looms with a fractured field and no clear front-runner beyond the endorsement

The timeline is compressed. Darline Graham was sworn in on July 14. Within a week, four additional major candidates had declared. The Aug. 11 primary gives every campaign roughly three weeks to make its case to voters, and the runoff provision, triggered if no one tops 50 percent, means the race could extend to Aug. 25.

In a multi-candidate field this large, a runoff is likely. Trump's endorsement gives Darline Graham a structural advantage in name recognition and grassroots support, but it has not scared off competitors with real political résumés and their own bases of support. Norman and Fry hold congressional seats. Sanford has statewide name recognition from two gubernatorial terms. Lynch already ran a statewide campaign this cycle.

Trump's endorsements have carried enormous weight in Republican primaries across the country, and his record this cycle has been strong. But South Carolina Republicans now have a choice between a candidate whose primary credential is the president's backing and several candidates who can point to legislative records, statewide experience, or both. The outcome will say as much about the limits of endorsement politics as it does about Trump's influence over the Republican Party's direction.

When five Republicans ignore a presidential endorsement and jump into the same primary, the endorsement is still an advantage, but it is not a coronation. South Carolina voters will decide whether loyalty to a name is enough, or whether the seat demands someone who has already done the job.