‘He’s all in’: Trump tests his sway over the GOP with Darline Graham
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President Donald Trump listens as Sen. Darline Graham, R-S.C., speaks during her campaign rally in Myrtle Beach, S.C., on Aug. 21, 2026. | Jacquelyn Martin/AP Photo
Donald Trump is facing one of his biggest tests of the midterms — and it’s of his own making.
The president has spent a significant amount of time and money trying to help Sen. Darline Graham defeat Rep. Ralph Norman in Tuesday’s snap GOP Senate primary. He’s done more for Graham than he has for the battleground Republicans whose general election fights will determine control of Congress: Not only did he push her to run for a full term , he also held a rare in-person rally for her and tapped into his MAGA Inc. warchest during the final days of the race.
If, after lending all that support, Graham fails, it would be Trump ’s most embarrassing loss of the cycle. A win, however, would let him flex his ability to power an unknown political figure to office.
“If Darline does come up short, it would be just a massive, massive embarrassment to the White House and to the president. Just an utter rejection,” said Matthew Bartlett , a Republican strategist and former Trump State Department appointee during his first term.
Tuesday’s runoff to replace the late Sen. Lindsey Graham on the November ballot won’t meaningfully affect the balance of power in Washington. What it will do is reveal the extent of Trump ’s clout, because of just how much personal political capital he has expended in the race to convince voters to elect a virtual stranger.
“The fact that he came to the state on short notice to do a rally, and we haven’t seen that in a lot of endorsements, I think that sends a very strong message that he’s all in,” said Andrew Boucher , a GOP strategist and chair of South Carolina’s Charleston County Republican Party, who is neutral in the race.
Trump has framed the race as nothing less than a referendum on himself. Rallying with Graham in Myrtle Beach last week, the president told voters to “pretend, please, that I’m on the ballot.”
On Monday, a Federal Election Commission report revealed that Trump ’s super PAC had spent $827,000 on text messages and phone calls for Graham . It’s one of the largest expenditures this cycle from MAGA Inc., and cash that Republicans in battlegrounds are anxiously awaiting for themselves.
One national Republican operative, who was granted anonymity to candidly discuss the president’s influence on the race, noted just how far Trump ’s support has gotten Graham : “She wouldn’t even be in this place if she didn’t have [his support]. The outside help she’s had has kind of made this competitive.”
Before GOP Gov. Henry McMaster appointed her to serve out the remainder of her late brother’s term in July, Graham was a complete political novice. Graham has worked for the South Carolina Vocational Rehabilitation Department and has led the Commission for the Blind since 2019, but she had never held or even sought public office — a fact that her opponents have attacked her for repeatedly on the campaign trail, especially after she stumbled over a key foreign policy question on the debate stage earlier this month. Her clearest connection to electoral politics lay solely in being the late senator’s younger sister.
Trump’s past mistakes in South Carolina loom over the race. The Senate primary has echoes of the state’s governor’s contest earlier this summer, in which Lt. Gov. Pamela Evette , a little-known Trump-backed candidate, fell to the more well-known Attorney General Alan Wilson . As public polling began to show Evette trailing significantly in the first days of that runoff, Trump issued a rare dual endorsement to include Wilson .
Evette ’s defeat, coupled with a batch of uncharacteristic losses by Trump endorsees in GOP primaries in Georgia, Iowa, Minnesota, Wyoming and Michigan, has put all the more attention on Graham .
The power of his endorsement is on the president’s own mind, too. In a Sunday night post on Truth Social , Trump mused that his “Endorsements are stronger than ever,” pointing to splashy charts comparing his wins to his comparatively few defeats.
But in the same breath, he acknowledged that his power is not always absolute: “The few that lost were…
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