Five weeks before Louisiana Republicans vote on May 16, Sen. Bill Cassidy finds himself squeezed between two challengers in a closed primary where his 2021 vote to convict Donald Trump remains the defining issue, and where his own party's campaign arm has offered him something less than full-throated support.
Rep. Julia Letlow, who carries Trump's endorsement, and Louisiana Treasurer John Fleming, a founding member of the House Freedom Caucus, are both pressing Cassidy hard enough that Punchbowl News reported it is "highly unlikely" any candidate will clear 50 percent on primary night. That means a June runoff is almost certain, and the open question is whether Cassidy will be one of the two names on the ballot.
The math is blunt. A three-way split among Republican voters, in a state that only recently moved from its old jungle-primary system to closed Republican primaries beginning in 2024, gives Cassidy no crossover cushion. Only registered Republicans will decide this race. And among that electorate, the senator's record is a hard sell.
In February 2021, Cassidy voted to convict Trump during the president's second impeachment trial. He said at the time:
"I voted to convict President Trump because he is guilty."
That sentence has followed him ever since. He later said he would not support Trump in 2024, urged Trump to leave the race in 2023, and signaled openness to a third-party No Labels effort. For a senator running in a deep-red state where Trump's endorsement carries enormous weight, those positions amount to a long paper trail pointed in the wrong direction.
Trump endorsed Letlow, a move that immediately reshaped the contest and gave primary voters a clear alternative backed by the party's most popular figure.
Punchbowl News reported that Cassidy is "furious at the NRSC and Senate Majority Leader John Thune's political machine because he feels they haven't fully supported his reelection bid." He complained the NRSC "wasn't spending enough on his behalf during the primary."
The NRSC's response was not gentle. Punchbowl reported that NRSC Executive Director Jennifer DeCasper, in a response that included profanity, told Cassidy he "shouldn't have voted to convict Trump."
That exchange captures the bind Cassidy created for himself. He cast the impeachment vote on principle, as he described it. But principle does not obligate the party's campaign committee to spend heavily defending a senator who spent years publicly opposing the party's standard-bearer. DeCasper's blunt reply suggests the NRSC sees the problem the same way rank-and-file voters do.
Thune did raise more than $650,000 for Cassidy at a January event in Baton Rouge. And the NRSC has cut video ads featuring the senator. But Cassidy evidently wants more, and the committee evidently does not think it owes him more.
Money has not been Cassidy's problem. He and allied groups began the year with a collective $26 million in the bank, Punchbowl reported. His campaign and the Louisiana Freedom Fund had poured more than $14 million into ads, Politico reported, citing AdImpact data.
That kind of spending in a single Senate primary is extraordinary. Yet it has not cleared the field or pushed either challenger out of contention. When $14 million in ads cannot put a race away, the problem is not the budget. It is the product.
The ads have gone after both opponents. Attacks on Letlow have focused on her past comments on diversity, equity, and inclusion and on her trading of defense-contractor stocks amid the war in Iran. Cassidy himself has faced attacks over his legislative record, specifically his support for the Fiscal Year 2021 National Defense Authorization Act, the Infrastructure Investment and Jobs Act, the CHIPS and Science Act, and the Safer Communities Act.
Each of those bills passed with bipartisan support and bore the fingerprints of the Biden-era legislative agenda. In a closed Republican primary in Louisiana, that is not a résumé line, it is an attack ad waiting to happen. And his opponents have obliged.
John Couvillon, a pollster working for Fleming, offered Politico a sharp summary of Cassidy's predicament:
"Number one, you have a mistrust of Senator Cassidy amongst Republican based voters. Number two, since he does have a relatively Republican voting record, that doesn't get him any great affections from Democrats either. So he's kind of the proverbial man without a political country."
Couvillon works for one of Cassidy's opponents, so his assessment is not disinterested. But the structural observation holds. Cassidy alienated the Republican base with the impeachment vote and the anti-Trump posture. He did not win durable support from Democrats or independents, who cannot vote in the closed primary anyway. He sits in a no-man's land of his own making.
The pattern is not unique to Louisiana. Republican incumbents elsewhere have faced similar primary turbulence when their records drifted from the base. The difference here is the sheer volume of money Cassidy has spent trying to paper over the gap, and the fact that it may not be working.
If no candidate clears 50 percent on May 16, the top two advance to a June runoff. The real danger for Cassidy is not losing outright in the primary, it is finishing third and missing the runoff entirely. In a three-way race where two opponents each carry distinct appeal to different segments of the GOP electorate, a well-funded incumbent can still be squeezed out.
Letlow has Trump's endorsement and whatever grassroots energy that brings. Fleming has Freedom Caucus credibility and a populist profile. Cassidy has money, incumbency, and a voting record that includes both conservative positions and high-profile breaks with the party. Whether that combination adds up to a top-two finish is genuinely uncertain.
The broader context matters too. Republican leaders who break with the party's direction have faced increasing pressure from primary voters who expect alignment, not independence for its own sake. Cassidy's situation is the most expensive test case of that dynamic in the current cycle.
Louisiana's shift to closed primaries in 2024 removed whatever safety valve Cassidy might have had from crossover voters. Under the old jungle-primary system, Democrats and independents could participate. Now only Republicans decide. That structural change turned Cassidy's vulnerability from a manageable risk into an existential one.
Meanwhile, Senate seats across the country are generating competitive Republican primaries, and the national party has limited resources to spread around. An incumbent who needs $14 million in ads just to stay competitive in his own primary is not a candidate the NRSC can afford to prop up indefinitely, especially when the NRSC's own executive director has told him, in colorful terms, that his problems are self-inflicted.
Several questions remain unresolved. No public polling numbers or vote margins appear in the current reporting. Whether Cassidy's ad blitz has moved the needle, whether Letlow and Fleming are splitting the anti-Cassidy vote or whether one has pulled ahead, and whether turnout in the new closed-primary format will favor the incumbent or his challengers, all of that remains unknown until voters weigh in.
What is clear is that Cassidy made a series of choices, the impeachment vote, the public opposition to Trump, the flirtation with No Labels, and those choices have consequences. He is now spending a fortune trying to survive them in the very electorate he antagonized.
Election battles across the South continue to test whether Republican voters will tolerate incumbents who chart their own course on the biggest fights of the era. Louisiana's May 16 primary will deliver one of the clearest verdicts yet.
Twenty-six million dollars buys a lot of television ads. It does not buy back the trust of voters who watched you side against their president and then ask for their votes.
