Sen. Bill Cassidy of Louisiana faces a pivotal test Saturday as he competes in the state's Republican Senate primary, one year after becoming one of seven GOP senators to vote to convict former President Donald Trump during his second impeachment trial following the Jan. 6, 2021, riot at the U.S. Capitol.
Cassidy is running against Rep. Julia Letlow, who has received Trump's endorsement, and former Rep. John Fleming, a pro-Trump candidate. Polls show all three candidates in a close contest. If no one secures an outright majority Saturday, the top two will advance to a June 27 runoff.
The race's outcome may hinge on Louisiana's recent shift from a "jungle primary" system — where candidates of all parties appeared on the same ballot and the top two advanced — to a closed Republican primary. Only registered Republicans can vote in Saturday's contest, excluding the independents and Democrats who might have supported Cassidy's impeachment stance.
What the Left Is Saying
Progressive groups and Democratic strategists are watching closely as another potential check on Trump faces electoral consequences for his 2021 conviction vote. "This is what accountability looks like," said one Democratic strategist familiar with Senate races, speaking anonymously to discuss political dynamics. "These members made a principled stand, and now they're being punished for it by their own party base."
Senate Majority Leader Chuck Schumer's office has not commented publicly on individual Republican primaries, but Democrats have generally benefited from the intraparty conflicts within the GOP over Trump's fitness for office.
The outcome could affect Senate balance of power. If Cassidy falls, it would reduce the number of Republicans willing to cross Trump on constitutional matters — a dynamic that proved significant during both impeachment trials.
What the Right Is Saying
Trump loyalists and conservative commentators argue that voting to convict a president from one's own party represents an act of disloyalty that voters have every right to punish. "Republican primary voters know exactly who Bill Cassidy is," said a spokesperson for a pro-Trump political action committee. "They remember his vote, and they're exercising their democratic right to hold accountable those who abandoned the president when it mattered most."
Conservative media outlets have run extensive coverage of Cassidy's impeachment vote, framing it as evidence that he prioritized personal political calculations over loyalty to conservative voters who sent him to Washington.
Republican National Committee Chairman officials have echoed Trump's endorsement of Letlow, arguing that the party must remain unified behind candidates who support the administration's agenda — a position they say is incompatible with voting to convict a Republican president.
What the Numbers Show
The survival rate for pro-impeachment Republicans in subsequent elections has been low. Of the 10 House Republicans and 7 Senate Republicans who backed Trump's impeachment or conviction, only three have successfully won re-election: Reps. Dan Newhouse of Washington and David Valadao of California, both of whom advanced through open primaries in 2022 before winning their general elections; and Sen. Lisa Murkowski of Alaska, who survived through a similar system.
The common thread is that all three succeeded in states or districts with jungle primary systems that allowed non-Republican voters to participate. Newhouse is not seeking re-election this cycle. Valadao is running for another term.
In contrast, pro-impeachment Republicans who faced closed Republican primaries were either defeated or chose not to run again — a pattern observers say reflects the composition of committed GOP primary voters, among whom Trump retains strong support.
One exception looms: Maine Sen. Susan Collins, also facing re-election this year but drawing no Trump-backed challenger. Analysts attribute this to Maine's blue-leaning electorate, where Collins is viewed as the only Republican capable of winning statewide.
Saturday's Louisiana primary will test whether Cassidy can break from the pattern — or whether he becomes the latest casualty of his 2021 conviction vote.
The Bottom Line
The fate of Bill Cassidy's campaign will offer a key data point on whether any Republican who opposed Trump after Jan. 6 can survive in a partisan primary environment. If Cassidy fails to make the runoff, it would mark another reduction in Congress's ranks of members willing to check executive power across party lines.
Even if Cassidy advances to June 27, he faces long odds against either Letlow or Fleming in a Republican-only electorate that has shown consistent hostility toward his impeachment vote. The race will be closely watched by both parties as an indicator of Trump's continued grip on the GOP primary electorate heading into the broader election cycle.