Louisiana GOP Primary Tests Trump Influence on Party

Louisiana Republicans head to the polls Saturday in a Senate primary that puts President Donald Trump's hold over the party to another test. Sen. Bill Cassidy, the two-term incumbent who voted to convict Trump during the 2021 impeachment trial, is fighting to keep his seat against two challengers who present themselves as more reliable allies of the president.

Cassidy's troubles trace back to that single vote five years ago. One of just seven Senate Republicans to support conviction over the January 6 Capitol events, the Louisiana doctor has tried to rebuild bridges by delivering the key vote to confirm Robert F. Kennedy Jr. as Health and Human Services secretary. Yet tensions remain. Cassidy has publicly clashed with Kennedy over changes to infant vaccine schedules and advisory panels, drawing fresh scrutiny from Make America Healthy Again supporters who view him as out of step.

Trump has made his preference clear. He endorsed Rep. Julia Letlow in January and followed up this week with praise on Truth Social, calling her a total winner who has always delivered for Louisiana. State Treasurer John Fleming, a former congressman, is also in the race and has positioned himself as a stronger conservative alternative. An Emerson poll last month showed Cassidy trailing both Letlow and Fleming among likely Republican voters.

Senate GOP leaders have offered Cassidy quiet support. Majority Leader John Thune called him a terrific senator and stressed the party's duty to back incumbents. The National Republican Senatorial Committee has done the same. That stance creates an awkward split with Trump, who has shown little patience for lawmakers who broke ranks in the past. Earlier this month five Indiana state senators who opposed Trump's redistricting push lost their primaries after the president targeted them.

If no candidate clears 50 percent on Saturday the race heads to a June 27 runoff between the top two finishers. Cassidy has leaned on his legislative record and claimed he works well with the administration despite the old impeachment vote. Letlow has countered that Louisiana voters should not have to wonder where their senator stands when pressure mounts. Fleming has hammered similar themes of loyalty and conservative consistency.

The contest fits a pattern. Trump has used endorsements to punish perceived disloyalty, and the results in Indiana suggest the effort carries weight in solidly red states. Cassidy cruised to reelection six years ago, but the political ground has shifted. Primary voters now decide whether his past break with the president outweighs his current efforts to cooperate.

Turnout and runoff math will determine the final outcome. For now the race serves as the latest measure of how far Trump's influence reaches inside the Republican Party.