Trump's South Carolina Endorsement Faces New Test in Crowded Senate Race

A special election to fill the late Senator Lindsey Graham's seat has turned into a high-stakes test of President Donald Trump's political clout, as multiple Republican challengers defy his endorsement of the appointed incumbent. The race in South Carolina is drawing national attention and offers lessons for Iowa voters watching the evolving dynamics of the GOP primary process.

Who is running for Lindsey Graham's Senate seat?

Senator Darline Graham, appointed last week to complete her brother's term, announced Monday she will seek a full term. She quickly secured Trump's endorsement, a move that often clears the field in Republican primaries. But this time, it hasn't.

Representative Russell Fry, a loyal Trump ally, entered the race Monday. He joins Representative Ralph Norman, who declared his candidacy over the weekend, and businessman Mark Lynch, who previously lost to Lindsey Graham. Other potential candidates include former Governor Mark Sanford and Lieutenant Governor Pam Evette, who recently lost her own gubernatorial bid despite Trump's support.

Why are Republicans challenging a Trump-backed candidate?

Some South Carolina Republicans see an opening because Darline Graham has never held elected office. Her appointment was widely viewed as a tribute to her late brother, not a stepping stone to a full term.

“Even folks that didn't like Senator Graham or didn't vote for him in the primary were pretty happy about the appointment, as a tribute to Senator Graham,” said CJ Westfall, chair of the Dorchester County GOP. “But once we saw the president jump in and support her, 95 percent are saying, 'What the hell are we doing here? We don't know how she votes. We don't know what she believes.'”

Westfall added: “People that were excited about the appointment are now skeptical of the endorsement.”

Has Trump's endorsement power weakened?

While Trump's endorsees have largely won their primaries, recent losses in Iowa and Georgia gubernatorial races, plus Evette's poor showing in South Carolina, have raised questions. One Republican operative unaffiliated with the race noted that Evette's “terrible performance” showed this race “could be up for grabs.”

All candidates are running as unapologetic Trump supporters, competing to prove who is the most authentic champion of his agenda. Norman told reporters that Trump's endorsement “helps a great deal” and that he had asked for it. Fry's campaign video presented him as a “MAGA warrior” with photos alongside the president.

Fry campaign spokesperson Luke Byars said Fry has “been honored to receive President Trump's endorsement” in past elections. “Our focus for the next three weeks remains ensuring South Carolina has a conservative fighter in the United States Senate who will advance the President's agenda and deliver real results for South Carolina families,” Byars said.

What are the eligibility questions surrounding Darline Graham?

A South Carolina GOP rule requires candidates to have voted in at least two of the past three statewide GOP primaries. According to local outlet FITSNews, Graham voted in the 2024 GOP runoff but not the 2022 or 2024 primaries. The Dorchester County Republican Party has formally requested a review of her eligibility by the state party's rules committee.

State GOP chair Drew McKissick said he had not yet reviewed the issue because the filing window had not opened. “Suffice it to say that we will look at all of the various candidates' information and official voting records from the state election commission when they do,” he said.

Graham's campaign spokesperson Abby Zilch said she meets the requirement and is “qualified to run because she has real experience leading.” Zilch added that Graham is “a strong conservative who wants to build upon her brother's legacy.”

How does this race impact Iowa voters?

For Iowans, this race offers a real-time case study in how Trump's endorsement power is evolving. Iowa's own recent gubernatorial primary saw a Trump-backed candidate lose, a reminder that local voters often weigh candidate quality and record over national endorsements. The outcome in South Carolina could signal whether Trump remains the undisputed kingmaker in GOP primaries or whether his influence is waning.

What is the timeline for the election?

The candidate filing window closes July 28. The special election is August 11. If no candidate reaches 50 percent, a runoff would follow in late August. The compressed schedule may favor Graham, who has access to her brother's campaign infrastructure. Memorial services for Lindsey Graham on July 28 and 29 will further shrink the campaign calendar.

“We say it's a three-week campaign, but really it's a two-week campaign after the funeral,” said Tyson Grinstead, an RNC committeeman and Richland County GOP chair.

What are other Republicans saying?

Senate Majority Leader John Thune said he would stay out of the race, calling Graham a “strong candidate” but leaving the decision to voters. Senators Mike Lee and Rick Scott have endorsed Norman, publicly bucking Trump. Norman has suggested Fry's candidacy could jeopardize the Republican House majority by triggering a special election for his vacant seat.

Greenville County GOP chair Jeff Green summed up the sentiment of many: “We don't always understand what's going on in D.C. We try to give the president a lot of grace on these things. Would I have picked another Graham to replace Lindsey Graham? Probably not. We don't know her yet. But we're open and trusting in what the president and his team are doing.”

Representative Nancy Mace announced Monday she would not enter the race.

This article is based on reporting from Yahoo and other sources.