Sen. Bill Cassidy got a blunt reminder of his 2021 impeachment vote when he called the National Republican Senatorial Committee to complain about campaign funding, and the committee's executive director reportedly threw it back in his face.
Punchbowl News reported Friday that the Louisiana Republican accused the NRSC of not pouring enough money into his reelection bid. Jennifer DeCasper, the NRSC's executive director, responded with profanity and told Cassidy he "shouldn't have voted to convict Trump," the Daily Caller reported, citing the Punchbowl account based on anonymous sources.
The exchange lays bare a fault line that has followed Cassidy since January 2021, when he joined Democrats and six other Republican senators in voting to convict President Trump after his second impeachment. Five years later, that vote is the defining issue in a three-way Louisiana GOP primary that could end Cassidy's Senate career on May 16.
The funding complaint is striking given the resources Cassidy already commands. His office said in January that the senator and groups supporting his reelection had a combined war chest of $26 million. Senate Majority Leader John Thune hosted a fundraiser that same month that raised $652,000 for Cassidy's campaign, the Washington Reporter first reported.
Both Thune and NRSC Chairman Tim Scott have endorsed Cassidy. Scott told Axios in March 2025 that the committee would back incumbent GOP senators during the 2026 cycle even when they face pro-Trump primary challengers.
"We're going to play in all of the races, all of our primaries."
Scott's pledge, and the NRSC's release of video ads supporting Cassidy, suggest the committee has not abandoned the incumbent. But Cassidy apparently wanted more, and DeCasper's reported response signals that the institutional GOP's patience with his impeachment vote has limits.
The NRSC declined to comment to the Daily Caller News Foundation. Cassidy's campaign did not respond either.
The senator's frustration may reflect what the numbers are telling him. Multiple March polls paint a picture of an incumbent who could miss the runoff entirely.
An American Pulse Research & Polling survey put Trump-endorsed Rep. Julia Letlow at 31 percent, Louisiana Treasurer John Fleming at 25 percent, and Cassidy at just 21 percent. A BDPC poll showed a similar order: Letlow 29, Fleming 23, Cassidy 19. In hypothetical runoffs from both surveys, Cassidy was not even on the ballot, Letlow and Fleming were the top two finishers.
A Fabrizio, Lee & Associates poll offered a slightly less dire picture, placing Letlow at 27 percent, Cassidy at 26, and Fleming at 19, with 28 percent undecided. But even that survey showed Letlow leading Cassidy 46 to 34 in a hypothetical runoff, with 20 percent still up for grabs.
Only a March poll from Public Opinion Strategies, sponsored by Cassidy's own campaign, put the incumbent ahead, at 35 percent to Letlow's 24 and Fleming's 21. Even there, a Cassidy-Letlow runoff was essentially a toss-up: 45 to 43.
The structural problem for Cassidy is straightforward. Louisiana switched away from its all-party "jungle primary" system after the 2024 cycle. Under the old format, Cassidy could draw crossover support from independents and Democrats. Breitbart noted that the closed Republican primary eliminates that safety net, leaving Cassidy exposed to a base that has not forgiven his impeachment vote. Trump carried Louisiana by 24 points in 2024. This is not swing-state territory.
Cassidy's best hope may be that his two opponents divide the voters who want him gone. Letlow, who won a 2021 special House election after working at the University of Louisiana at Monroe, has Trump's endorsement. Fleming, a former congressman and one of the nine co-founders of the House Freedom Caucus, carries his own conservative credentials as the current state treasurer.
If no candidate clears 50 percent on May 16, the top two advance to a June 27 runoff. The question is whether Cassidy can finish in the top two at all.
Newsmax reported that the split anti-Cassidy vote could force exactly that runoff scenario, but warned the outcome is far from certain given Cassidy's spending advantage. Trump is actively working to push Cassidy out, having endorsed Letlow specifically because of the impeachment conviction vote.
Republican state Rep. Mike Bayham, who told Politico he has remained neutral in the primary, offered a more measured read of the race dynamics.
"The Trump endorsement has not had a close-out move. Cassidy was ready for her. They defined her before she introduced herself."
Bayham's assessment suggests Cassidy's millions have blunted Letlow's momentum, at least so far. But defining an opponent on television is one thing. Overcoming a base that remembers your impeachment vote is another.
Cassidy aide Mark Harris told Politico the campaign knows exactly where it stands.
"We're in the middle of a dogfight. Everyone's expectation is that she would shoot to a large lead and that we'd all be running from behind. But frankly I think they just weren't ready for this race."
Harris's framing, that Letlow's team underestimated Cassidy, may be accurate on tactics. But it sidesteps the deeper problem. The impeachment vote is not a tactical issue. It is a trust issue with Republican primary voters, and no amount of ad spending erases it.
Cassidy himself acknowledged the weight of his decision after the 2021 trial. "I voted to convict President Trump because he is guilty," he said at the time, as Breitbart noted. That quote has followed him ever since, and in a state Trump won by 24 points, it is the kind of statement that defines a primary.
The broader pattern across the GOP is unmistakable. Of the seven Republican senators who voted to convict Trump, only three remain in office: Cassidy, Alaska's Lisa Murkowski, and Maine's Susan Collins. Murkowski survived a 2022 reelection despite Trump endorsing her opponent. Collins faces voters again this November as the presumptive GOP nominee. Multiple other Republican senators have stepped aside ahead of the 2026 midterms rather than face the electorate.
The reported phone call between Cassidy and the NRSC raises a question that goes beyond one Louisiana primary. The committee endorsed Cassidy. Its chairman pledged to support incumbents. Thune raised more than half a million dollars for his campaign. The NRSC ran ads on his behalf.
And still, when Cassidy called to ask for more, the executive director's reported answer was: you brought this on yourself.
That tension, between institutional loyalty and political reality, is playing out across the party. The NRSC's formal position is to back incumbents. But Trump's enormous midterm war chest and his willingness to endorse primary challengers create a parallel power structure that institutional Republicans cannot ignore.
DeCasper's profanity-laced response, as described by Punchbowl's anonymous sources, may have been impolitic. But the substance of her message, that Cassidy's impeachment vote has consequences, is a statement of observable fact. Every public poll except his own campaign's internal shows him trailing or barely competitive.
Cassidy has the money. He has the endorsements from Senate leadership. He has spent millions defining his opponents. What he does not have is a way to un-cast the vote that Louisiana Republicans remember most clearly.
Other senators facing similar headwinds have read the room and stepped aside. Cassidy chose to fight. Whether that was courage or miscalculation, Louisiana voters will decide on May 16.
When the party's own campaign arm tells you the problem is the choice you made, not the money it spent, that is not a funding dispute. That is an exit interview.