When Darline Graham won South Carolina’s Republican Senate primary runoff this week, the outcome surprised many—including some conservatives who had backed her opponent. But new data shows the result wasn’t a shock at all. It was the latest proof that Donald Trump remains the dominant force in GOP primaries.
Graham, the sister of the late Sen. Lindsey Graham (R-S.C.), defeated Rep. Ralph Norman (R-S.C.) in the runoff. Norman was widely seen as the more qualified candidate, and his loss disappointed some Republicans who hoped the party would reward experience over name recognition. Yet Graham’s victory was powered by something far more potent than her resume: a Trump endorsement.
The endorsement effect
According to CNN’s chief data analyst Harry Enten, Trump-endorsed non-incumbent Senate candidates have won their primaries at a nearly perfect rate since 2022. “100 percent of the time, if Trump endorsed a non-elected incumbent, like Darline Graham, they, in fact, won the Republican primary for United States Senate,” Enten said Wednesday morning.
The numbers before Trump weighed in tell the real story. Kalshi, a prediction market, gave Graham just a 14% chance of winning the runoff before the endorsement. After Trump backed her, her odds jumped past 50%, and she won the nomination the next night. “The reason why Darline Graham won that primary, won that nomination, is because of one name and one name only, Donald John Trump,” Enten said.
CNN anchor John Berman noted how hands-on Trump was in the race: “He went there. He spent money. He made a difference.”
Trump’s brand outshines Reagan and Lincoln
Trump’s influence is rooted in how Republican voters view him. Enten cited polling showing 53% of Republicans say Trump is the Republican president they most admire. That’s far ahead of Ronald Reagan, who pulled just 18%, and Abraham Lincoln, who came in at 8%.
For many GOP voters, Trump’s endorsement carries more weight than any debate performance or argument about qualifications. Graham’s campaign leaned heavily on her brother’s legacy rather than building her own, and her debate against Norman was widely criticized as a disaster. But none of it mattered once Trump stepped in.
The result is a reality check for the party. South Carolina Republicans nominated Graham because Trump asked them to—not because she demonstrated she was the best candidate. As one conservative commentator put it, Trump’s instincts about what moves Republican primary voters are hard to argue with, even if the outcome leaves some uncomfortable.
For better or worse, the GOP’s orbit still revolves around Trump. And as the 2026 cycle continues, candidates would be wise to remember that.
Source: pjmedia.com — https://pjmedia.com/matt-margolis/2026/08/26/how-trump-pushed-darline-graham-over-the-finish-line-n4956591
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