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." 

Trump had already endorsed Cassidy's primary challenger, Rep. Julia Letlow, R-La.

On the morning of the primary, Trump on Saturday further urged Lousiana voters to back Letlow.

This is a developing story. Please check back for updates.