Sen. Bill Cassidy of Louisiana — one of seven Republican senators who voted to convict Donald Trump after the Jan. 6 attack — is the only member of that group actively seeking reelection this cycle. His fight for a third term has become a test of Trump’s continuing influence in the GOP and of whether a Republican known for occasional independence can hold on in today’s polarized politics.
Cassidy faces two challengers in the primary: Rep. Julia Letlow, who has President Trump’s endorsement, and former Rep. John Fleming, who served in the Trump administration. Louisiana’s top-two primary rules mean the two highest vote-getters advance to a runoff if no candidate clears 50 percent. The race pits a veteran senator and chair of the Senate health committee against a younger, pro-Trump congresswoman and a more traditional conservative insurgent.
For many Republican voters in Louisiana, Cassidy’s vote to convict felt like a betrayal. At the Breaux Bridge Crawfish Festival, retired deputy sheriff Kevin Dupree said Cassidy had lost his trust and that his political career in the state was finished. Others were less absolute. Kelby Daigle, chair of the St. Martin Parish GOP, supports Cassidy, saying the senator made the right call in 2021 and worries the party has become too focused on one leader rather than enduring principles.
Trump’s endorsement of Letlow carries weight with a sizeable swath of primary voters. At campaign stops, supporters say they back Letlow because Trump asked the state to send her to the Senate. Letlow, who won a 2021 special House election after the death of her husband Luke Letlow, has pushed education and children’s issues in Congress and sponsored the so-called Parents Bill of Rights. She has embraced Trump’s agenda and largely avoids personal attacks on Cassidy, framing her campaign around listening to voters.
Cassidy’s campaign has tried to blunt Letlow’s momentum by casting her as out of step with conservative values because of past work in higher education. At the same time, Cassidy emphasizes accomplishments he argues benefit Louisiana directly: steering federal recovery dollars after floods, securing infrastructure investments and passing bills on prescription drug costs and fentanyl enforcement that Trump signed. He leans on his background as a physician and his record of delivering federal resources to persuade voters he’s focused on practical results rather than personality-driven politics.
That strategy aims to attract not only traditional Republicans but also some Democrats and independents. A few voters, like Eli Feinstein, a longtime Democrat who recently changed his registration to no party, say they’ll cross over to support Cassidy in the GOP primary even if they plan to vote for a Democrat in November. Cassidy has publicly asked Democrats to switch registrations to help him in the closed contest — a change that Republican Gov. Jeff Landry pushed for this year, restricting the ability of registered Democrats to request Republican primary ballots.
But Cassidy is squeezed from both sides. Pro-Trump voters demand loyalty and view his conviction vote as disqualifying. Moderates and some Democrats admire his independence but worry his efforts to court Trump supporters look opportunistic. Former Lt. Gov. Jay Dardenne summed up the dilemma: Cassidy is trying to satisfy both camps and risks pleasing neither.
Some Republicans also question Cassidy’s sincerity. Voter Debbie Spinks sees his late support for measures favored by Trump as politically timed. Others, like attorney Will Coenen, describe the electorate as deeply uncertain and worried about national issues — citing concerns such as foreign policy — and say they are looking for clear signals about who they can trust.
The outcome matters beyond Louisiana. Four of the seven Republican senators who voted to convict in 2021 retired rather than face voters; of the remaining two, Susan Collins (Maine) is running without a primary challenger, and Lisa Murkowski (Alaska) won reelection in 2022 under Alaska’s nonpartisan primary system. If Cassidy loses, the Senate would have one fewer Republican willing to break with Trump on rare occasions — and one fewer potential dealmaker on bipartisan legislation.
Cassidy remains at ease with his decisions, saying elected officials must weigh facts and live with the consequences — an approach he attributes to his medical training. On the trail he asks voters to focus on results for Louisiana and on the state’s future rather than re-litigating past disputes over the 2020 election.
Whether that message resonates with a primary electorate still largely guided by Trump’s preferences will be decided at the ballot box. The race will show how powerful presidential endorsements remain, how much room there is for Republican mavericks in the party, and whether pragmatic appeals to governance can overcome the pull of partisan loyalty in a deeply divided moment.