Trump endorsement primary results finally broke in the president’s favor on Tuesday, ending a stretch of defeats that had begun to raise questions about how much his backing still moves Republican voters.

The headline came from South Carolina, where CNN’s Decision Desk projected Darline Graham, sister of the late Senator Lindsey Graham, as the winner of the GOP special Senate primary runoff. She is now the clear favorite to claim a full term in November.

A Senator Built From Scratch

Few candidates owe their position to one person as completely as Graham owes hers to Trump.

The sequence tells the story. After Lindsey Graham died in July, Trump pushed Governor Henry McMaster to appoint his sister to serve out the remainder of the term. McMaster agreed. At that point the arrangement looked temporary, since the seat was already scheduled for a full six-year contest in November, and South Carolina has no shortage of veteran Republicans who have waited decades for exactly this opening.

Trump had other plans. Three days after she was sworn in, he publicly urged her on social media to run for the full term. She announced her candidacy days later.

His backing did not clear the field. Graham had never held elected office, and her brother was not universally admired among the state’s conservatives, having taken only 57 percent in his own primary two months earlier against a group of little-known challengers.

The 11 August primary confirmed her vulnerability. She finished first but collected barely 33 percent, forcing a runoff against Representative Ralph Norman.

Why This One Mattered More

Trump has issued endorsements liberally this cycle. He rarely spends this heavily on one.

When the runoff appeared to be slipping toward Norman, Trump traveled to Myrtle Beach on Friday to rally supporters. He told voters he had personally pressed Graham to run and asked them to treat the contest as though his own name were on the ballot. His super PAC, MAGA Inc., reported putting more than $827,000 behind her.

There was also no exit available if she lost. In the state’s gubernatorial primary, Trump’s preferred candidate, Lieutenant Governor Pam Evette, fell to Attorney General Alan Wilson, whom Trump endorsed at the last moment once Evette’s defeat looked certain. That maneuver was not on offer here. Norman had endorsed and campaigned alongside Nikki Haley during her 2024 challenge to Trump for the presidential nomination.

The margin was thin, only a few percentage points by Tuesday evening. But the timing gave it weight, arriving in a month when six Trump-endorsed candidates had already lost Republican primaries, with the midterms roughly two months out.

For Republicans in Congress weighing whether to put distance between themselves and an unpopular president, the result functions as a reminder of what that choice can cost.

The Losing Side’s Verdict

Norman did not dispute what happened. He told supporters that the president had gotten involved and had every right to do so, adding that he had never understood why Trump entered the race at all. Portions of the crowd booed at the mention. Norman said he would accept the outcome.

Graham, for her part, told her victory party that South Carolina is genuinely Trump country and thanked the president directly, saying the win would not have been possible without him.

The contrast with her brother is stark. Lindsey Graham was close to John McCain and cultivated an identity as a foreign policy hawk who operated independently of Trump. Darline Graham’s political identity begins and ends with the president.

Her inexperience did surface. In a debate with Norman earlier this month, asked about Taiwan and the South China Sea, she declined to engage, saying national security was not her area.

She now faces Democratic nominee Annie Andrews, a pediatrician, who used Tuesday to challenge her to at least three televised debates. Andrews argued that no appointment, endorsement or family relationship entitles anyone to six years in the Senate. In a state this reliably Republican, Graham remains heavily favored.

Oklahoma: A Smelter Decides a Race

Trump collected a second win, by an even slimmer margin, in Oklahoma’s Republican gubernatorial runoff. CNN projected former state Senator Mike Mazzei over Attorney General Gentner Drummond.

The winner advances to face Democratic nominee Cyndi Munson, the state House minority leader, in the November race to succeed term-limited Governor Kevin Stitt.

This contest carried its own significance for Trump, whose gubernatorial picks in Georgia, Iowa and Minnesota all lost earlier in the year.

The dividing issue was concrete: a proposed $4 billion aluminum smelter at the Tulsa Port of Inola, projected to create roughly 1,000 jobs. Trump has promoted the project enthusiastically, calling it among the finest ever conceived or built in Oklahoma or anywhere in the country. Drummond went the other direction, filing suit in federal court to halt construction amid local worries about pollution and harm to the livestock economy.

Georgia: A Short Tenure Ahead

In Georgia’s 13th District, Democrat Everton Blair, formerly chair of the Gwinnett County School Board, won the special election runoff for the seat left vacant by Representative David Scott’s death in April.

Blair will become Georgia’s first openly gay member of Congress. He defeated Marcye Scott, the late congressman’s daughter, running on a promise to confront Trump more forcefully and push a more progressive affordability agenda than either Scott had offered.

His time will be brief. Blair placed a distant third in the regular primary earlier this year, so he will not appear on November’s ballot. State lawmaker Jasmine Clark holds the Democratic nomination for the full two-year term in this solidly blue district. Clark skipped the special election because state law would have required her to resign her Georgia House seat, a loss Democrats could not afford while Governor Brian Kemp was pursuing his ultimately unsuccessful mid-decade redistricting effort.

Even so, Blair’s win matters arithmetically. Combined with state Senator Aisha Wahab’s special election victory in California last week, Democrats have shaved the already narrow Republican House majority a little thinner.