Why It Matters
Louisiana Senator Bill Cassidy’s defeat in the Republican primary marks a significant political moment, demonstrating the continued influence of presidential endorsements within the GOP and the electoral consequences facing Republicans who broke with Donald Trump during his second impeachment. Cassidy becomes the first sitting Republican senator to lose a primary since 2012.
What Happened
Senator Bill Cassidy, who voted to convict President Trump on impeachment charges in 2021, was eliminated from Louisiana’s Republican Senate primary on Saturday, May 16. Two challengers aligned with Trump — Representative Julia Letlow and state Treasurer John Fleming — advanced to a runoff scheduled for June 27.
Letlow, who carried Trump’s endorsement and the backing of Republican Governor Jeff Landry, led the field. Fleming finished second. Because no candidate secured an outright majority, the race moves to a head-to-head contest between the two.
Trump responded on social media shortly after the results came in, referencing Cassidy’s impeachment vote and declaring the senator’s political career finished. Trump had actively campaigned against Cassidy and celebrated the outcome publicly.
Cassidy, speaking to supporters on election night, did not mention Trump by name but addressed the broader political climate. “When you participate in democracy, sometimes it doesn’t turn out the way you want it to. But you don’t pout, you don’t whine, you don’t claim the election was stolen,” he said. He added that loyalty to the Constitution and the welfare of the country guided his decisions in office, and that anyone who governs for personal power rather than public service “is not qualified to be a leader.”
By the Numbers
- 45% — Letlow’s share of the primary vote, with 93% of expected ballots counted
- 28% — Fleming’s share of the primary vote
- 25% — Cassidy’s share, insufficient to survive the primary
- June 27 — scheduled date for the Letlow-Fleming runoff
- 2012 — the last time a sitting Republican senator lost a primary election
The Impeachment Factor
Cassidy was one of seven Republican senators who voted to convict Trump following the January 6, 2021 Capitol breach. That vote defined the primary race and overshadowed his subsequent efforts to support the administration’s policy agenda, including his vote to confirm Robert F. Kennedy Jr. as health secretary despite public disagreements over vaccine policy.
Cassidy had acknowledged in recent weeks that the impeachment vote could be a liability but argued that his legislative record and delivery for Louisiana should matter more to voters. Some supporters agreed. “It shows that he’s less influenced by a party, which I like,” said one Baton Rouge voter who backed Cassidy.
Others were less forgiving. A Fleming supporter at a Baton Rouge polling location put it plainly: “He tried to impeach Trump, and Trump helped him get elected. It is time for him to go.”
The Runoff Candidates
Letlow entered the race with substantial momentum, boosted by Trump’s endorsement and outside group advertising. She had attacked both Cassidy and Fleming as insufficiently loyal to the president, while Cassidy’s campaign sought to undercut her by pointing to her stock trading practices and past support for diversity, equity, and inclusion programs during her time at the University of Louisiana. Letlow dismissed those lines of attack, saying a third party managed her investments and that her position on DEI initiatives has changed.
Fleming, a former congressman, positioned himself as a conservative alternative and drew significant support despite being outspent. He will now face Letlow in a June runoff that figures to center on which candidate is most aligned with the Trump administration’s priorities. Louisiana voters are also tracking other contested races heading toward runoffs this cycle.
What’s Next
The Letlow-Fleming runoff will take place June 27. The winner will be the Republican nominee for Louisiana’s U.S. Senate seat and will be heavily favored in the general election in the deeply red state. Cassidy’s current Senate term runs through January 2027.
Cassidy’s loss leaves no remaining Republican senator who voted to convict Trump during the 2021 impeachment trial on a path to return to Congress in the current election cycle.