Donald Trump’s intervention reshaped Louisiana’s GOP primary, knocking Senator Bill Cassidy into third place and out of the race. Election-night returns showed Representative Julia Letlow and State Treasurer John Fleming finishing as the top two vote-getters, setting a June 27 Republican runoff after no candidate topped 50 percent, according to the Associated Press. NBC News projected Letlow and Fleming would advance. The result is being treated as a test of Trump’s grip on the Republican Party after he publicly recruited and endorsed Letlow over Cassidy for his 2021 impeachment vote.

Trump’s recruitment and endorsement of Julia Letlow turned a routine Senate primary into a referendum on loyalty. Cassidy, a two-term senator who chairs the Senate Health Committee, finished third in the closed Republican primary and conceded Saturday night. He urged supporters to accept the result, saying, "You don’t pout, you don’t whine, you don’t claim that the election was stolen," and he thanked voters for the privilege of serving.

Impeachment vote loomed over the race

Cassidy’s principal political liability was his 2021 vote to convict President Trump on charges tied to the January 6 attack on the U.S. Capitol. At the time Cassidy said, "Our Constitution and our country is more important than any one person," and "I voted to convict President Trump because he is guilty." Those lines were replayed across the final weeks of the campaign and became the central issue motivating many primary voters, media outlets and analysts said.

Trump seized on the vote. On Truth Social he called Cassidy disloyal, writing that Cassidy’s "disloyalty to the man who got him elected is now part of legend" and adding that "it’s nice to see his political career is OVER." The president’s endorsement of Letlow, and his public effort to unseat Cassidy, framed the contest as another example of his campaign to remove Republicans he regards as disloyal.

Election-night returns and projections showed Letlow and Fleming as the top two vote-getters in Louisiana’s closed Republican primary, with Cassidy finishing third, according to the Associated Press. NBC News projected Letlow and Fleming would advance to the runoff. The top two finishers will meet on June 27 because no candidate exceeded 50 percent.

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What the loss means for Republican lawmakers

Cassidy’s defeat follows a pattern in which Trump has intervened in GOP primaries at both federal and state levels. The strategy has produced several high-profile ousters and near-ousts of Republicans seen as not enoughly loyal.

Reporting named Cassidy as one of seven Republican senators who voted to remove Trump from office after January 6; other outlets noted that only a small number of those senators remain in office today.

Cassidy had long been a fixture of Louisiana politics. He was first elected to the U.S. Senate in 2014 after serving in the U.S. House and the Louisiana state senate. In Washington he often aligned with Republican priorities even as he took a high-profile break with his party over the impeachment vote. That mix of party loyalty on policy and a notable break on January 6 ultimately didn't insulate him from a primary challenge driven by allegiance to Trump.

Media coverage framed the result as another victory for Trump in his campaign against intra-party dissent. Conservative voters in the primary prioritized allegiance to the former president. Letlow’s and Fleming’s advance reflects how loyalty has become a deciding metric in Republican primaries in states where Trump remains popular.

Cassidy conceded without attacking the integrity of the contest. His concession remarks echoed the pledge he made in 2021 to defend institutions and the rule of law. Still, his loss is likely to reverberate through the Senate Republican conference. Several Republican lawmakers who voted to convict Trump either retired or faced primary challenges after 2021, and those dynamics have narrowed the cohort of Republicans willing to break with the former president.

For Letlow and Fleming, the runoff on June 27 will determine who becomes the GOP nominee in a state that has strongly favored Republicans in recent cycles. The winner of that runoff will enter the November general election as the overwhelming favorite, given Louisiana’s recent voting trends and party lean.

National attention on the race will keep the spotlight on Trump’s primary playbook. Observers will watch whether the party continues to prioritize loyalty above other considerations such as seniority, committee influence, or policy experience in Washington. In Louisiana, at least, loyalty delivered a swift and decisive outcome at the ballot box.

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They meet June 27 in a Republican runoff, with the victor entering November's general election as the heavy favorite in deep-red Louisiana.

This article was created with AI assistance.