Bill Cassidy

If Trump’s push to oust Cassidy succeeds, it could unleash another rogue in the Senate with a vendetta against Trump and nothing left to lose.

But Cassidy claims he’s not thinking about that. Asked whether he would be a thorn in Trump’s side in his remaining months in office should he go down and join other YOLO Republicans, Cassidy sounded defiant.

“I’m going to win today,” Cassidy said. “I may go into a runoff. But I’m always going to vote for the good of my country and my people.”

If no candidate clears 50 percent in today’s vote, the top two candidates will advance to a June 27 runoff. Recent polls show a tight three-way campaign. Most polling puts Cassidy in third place, behind Letlow and Fleming, another MAGA candidate.

Cassidy spoke with POLITICO by phone before he made his Election Day rounds after attending a wedding Friday evening. He talked of his plans to improve affordability and criticized Letlow for not voting for the Infrastructure Investment and Jobs Act.

“I don’t quite know why, but it takes courage, and so you got to know what’s right, and then you got to have the courage to do what’s right, and that’s what I have,” Cassidy said. “I’ve proven it. That’s what this race is about.”

But in the final hours before results roll in, the senator who drew Trump’s ire over his impeachment vote was the one crying foul over voting issues.

Cassidy echoed his concerns about Louisiana’s move to a closed primary system, telling Playbook he had just gotten off the phone with a “No Party” voter who tried to cast a ballot for him but said he could not. Cassidy said he’s communicating with Louisiana Secretary of State Nancy Landy, who he said is investigating. A spokesperson did not immediately respond to a request for comment.

“Today, I’m trying to make sure that people are able to exercise their right to vote … in a system which, in effect, has been designed to prevent people from being able to cast their vote for me,” Cassidy said.

He brushed off MAHA’s role in the primary. “People in our state want someone who has delivered,” he said. “If you’re talking about ‘Making America Healthy Again,’ my gosh, I’ve worked to make my state healthy again. And so if people are concerned about our state being healthier, then I’m your candidate.”

And he expressed no regrets over his impeachment decision.

“That is not something I think about.” Cassidy said. “If my opponent is focused on that, she’s thinking about five years ago. I’m thinking about five years from now. If she wants to be wedded to the past, be wedded in the past, but by golly, you’re not working for the future. I’m working for the future, that’s where I’m focused.”

Despite Cassidy’s resoluteness, GOP sources in Louisiana see an increasingly bleak outlook for Cassidy — no matter where he finishes at the end of the day.

“There is almost a 0.0 percent chance that Bill Cassidy is coming back to the Senate,” said an unaligned GOP strategist with experience running races in Louisiana and granted anonymity to assess the state of play.

“He’s run a lot of ads,” the person said, “and the problem with his ads is he’s in them.”