Senator Bill Cassidy voted to convict Donald Trump in his second impeachment trial, and Louisiana Republicans just handed him the bill — a third-place finish that effectively ended his Senate career.
Story Snapshot
- Trump-backed Julia Letlow won the Louisiana Republican Senate primary with 45.1% of the vote, with John Fleming second at 28.2% and incumbent Bill Cassidy a distant third at 24.6%.
- Cassidy was one of seven Republican senators who voted to convict Trump after the January 6 Capitol riot — a vote that defined his political fate in Louisiana.
- Pre-election polling from 270toWin had already signaled Cassidy’s weakness, showing him trailing both Trump-aligned challengers heading into primary day.
- Letlow and Fleming advance to a runoff, while Cassidy’s Senate tenure effectively ends — a direct consequence of crossing Trump in a deep-red state.
The Impeachment Vote That Became a Political Death Sentence
When Cassidy cast his vote to convict Trump following the January 6, 2021 Capitol riot, he almost certainly knew the political cost in Louisiana. What he may not have fully appreciated was how long that cost would compound. Pre-election polling aggregated by 270toWin showed Cassidy stuck at roughly 20 to 25 percent, trailing both Letlow and Fleming, who each built their campaigns around Trump loyalty and Cassidy’s perceived betrayal of the Republican base. [2] The numbers never moved meaningfully in his favor.
Cassidy’s suburban strongholds in East Baton Rouge, Jefferson, and St. Tammany parishes provided some cushion, but they weren’t enough to overcome a statewide electorate that had moved decisively in Trump’s direction. NBC News election analysts noted that early returns showed Cassidy consistently trailing in third place across most parishes, not just in rural areas where MAGA support runs deepest. [1] The geographic breadth of his underperformance made the result look less like a regional anomaly and more like a statewide verdict.
Trump’s Endorsement Machine Proved Its Power Again
Trump endorsed Julia Letlow, a congresswoman from northeast Louisiana, and the endorsement carried real weight. Letlow captured 177,767 votes, more than 45 percent of the Republican primary electorate, a commanding margin in a three-way field. [1] PBS NewsHour framed the contest as a critical test of Trump’s influence in Louisiana Republican politics, and by that measure, the test produced a clear answer. When a sitting president throws his weight behind a candidate in a closed Republican primary, the base listens.
John Fleming, a former congressman and House Freedom Caucus figure with his own Trump-aligned credentials, finished second with 28.2 percent. [1] Both Trump-aligned candidates combined for more than 73 percent of the vote, leaving Cassidy with less than a quarter of his own party’s primary electorate. That is not a squeaker. That is a structural rejection. The argument that field fragmentation explains Cassidy’s loss misses the obvious: both challengers ran against him on the same essential premise, and together they buried him.
What a 24.6 Percent Finish Actually Means for the Republican Party
Some analysts will argue that a three-way primary distorts the true ideological picture, that Cassidy was squeezed by split dynamics rather than genuine voter fury. That argument deserves a fair hearing, but it doesn’t survive contact with the actual numbers. Cassidy was a two-term incumbent senator with name recognition, a fundraising apparatus, and the institutional advantages of office. Finishing nearly 20 points behind the leader in your own party’s primary is not a statistical artifact of field structure. It is a referendum. [1]
Pretty shocking results out of Louisiana tonight: Sen. Bill Cassidy—a notorious RINO and Obamacare lover who voted to convict Trump during impeachment—will finish THIRD in the GOP primary and will not make it to the run-off. Good riddance! pic.twitter.com/z3dDiB9jfH
— Sean Davis (@seanmdav) May 17, 2026
The deeper implication here goes beyond Cassidy. Republican senators who voted to convict Trump — all seven of them — have now watched their political fortunes deteriorate in varying degrees. Louisiana just delivered the most recent data point. In a nationalized Republican primary environment where Trump endorsements function as a powerful loyalty signal, voting to remove a sitting president from office carries consequences that don’t fade with time. Cassidy’s 24.6 percent is a number every Republican senator with a primary on the horizon will be studying carefully. [1]
Sources:
[1] Web – 2026 United States Senate election in Louisiana – Wikipedia
[2] Web – 2026 Polls: Louisiana Senate – 270toWin.com
