Trump-backed challenge threatens Cassidy’s Senate career in Louisiana primary
Bill Cassidy’s vote to convict Trump in 2021 has turned into a live threat: a Trump-backed challenge could end his Senate run in Louisiana’s closed GOP primary.
Bill Cassidy’s 2021 vote to convict Donald Trump has become the central liability in a race that could end his Senate career. The Louisiana Republican, one of only seven GOP senators to vote to convict Trump, is now fighting for survival against a Trump-backed field that includes Rep. Julia Letlow and state Treasurer John Fleming.
Cassidy’s break with Trump was not limited to the final conviction vote. He also voted on Feb. 9, 2021, that the Senate had jurisdiction to try Trump after he left office, then voted on Feb. 13, 2021, to convict him on the article charging incitement of insurrection. The Senate acquitted Trump, and the conviction effort fell 57-43, but the political fallout in Louisiana has lingered ever since. The Louisiana Republican Party later censured Cassidy over the vote, turning a single impeachment choice into a durable test of party loyalty.
Trump intensified that pressure in January 2026, when he encouraged Letlow to enter the race. His endorsement was widely read as a message to Republican voters that Cassidy’s impeachment vote should carry a cost. Cassidy is the last of the seven Republican senators who voted to convict Trump and is still seeking reelection, making Louisiana one of the clearest remaining tests of whether intraparty dissent from Trump is still punishable inside the Republican Party.
The contest is playing out under Louisiana’s new closed-party primary system, adopted through Act 1 of the 2024 First Extraordinary Session. For covered offices, only voters registered with a party can vote in that party’s primary, though unaffiliated No Party voters may choose either party. If no candidate wins a majority in the May 16, 2026 primary, the top two finishers will advance to a June 27 runoff.
Recent polling has shown Cassidy trailing. A late-April 2026 Emerson College survey put Fleming first at 28%, Letlow second at 27%, and Cassidy third at 21%. The numbers underscore how quickly a loyalty contest can become an electoral threat in a state where Louisiana remains strongly Republican at the federal level, making the GOP nominee the heavy favorite in November.
That is why this race matters far beyond Louisiana. It is a measure of how long Trump can keep political dissent punishable in today’s Republican Party, and whether voters are judging Cassidy on ideology, loyalty, or simple political survival in a party where those distinctions have all but collapsed.
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