Trump blasts Sen Bill Cassidy as 'disloyal disaster,' pushes challenger Julia Letlow in Louisiana GOP primary

President Donald Trump bashed Sen. Bill Cassidy, R-La., who is running for reelection, in a Saturday morning Truth Social Post, calling him a "sleazebag" and "a terrible guy." 

"VOTE TODAY FOR JULIA L. She Is a winner who will NEVER let you down," Trump wrote. 

Trump's criticisms of Cassidy centered on the Senator's vote to convict Trump during his 2021 impeachment.

"Senator Bill Cassidy of Louisiana is a disloyal disaster. His entire past campaign for the Senate was about 'TRUMP,' how he's with me all the way, and then, after winning, he turned around and voted to IMPEACH me for something that has now proven to be total 'bullshit!' He knew that at the time, but didn't care," Trump wrote.

He has been mired in an adversarial relationship with Trump ever since. 

Trump then blasted Cassidy in April, blaming him for the failed nomination of Kennedy Jr. ally Casey Means as Surgeon General. 

"For months, Senator Bill Cassidy (of the GREAT State of Louisiana!), a very disloyal person whose 'TRUMP' Endorsement got him elected, but later voted to impeach 'President Trump' on what has now proven to be a total Hoax and Scam, has stood in the way of Robert F. Kennedy Jr.'s Nominee, Casey Means, for the important position of U.S. Surgeon General," Trump wrote in an April 30 post on Truth Social.

He has ramped up his attacks on Cassidy ahead of Saturday's GOP primary in Louisiana while continuing to boost Letlow, who he endorsed before she even officially entered the race.

According to RCP, Cassidy is even behind Louisiana Treasurer John Fleming, who is also running for the GOP nomination.

If any of the candidates get over 50% of the vote, they will be the GOP's nominee to face a Democratic opponent in the Nov. 3 general election. If no candidates receive over 50% the top two candidates will advance to a runoff election slated for June 27. 

Fox News Digital contacted the offices of Cassidy and Letlow for further comment.

Fox News Digital's Paul Steinhauser and Luke Trevisan contributed to this report.