(CNN) — Republican Sen. Bill Cassidy of Louisiana said Sunday he doesn’t think Donald Trump would be able to win a general election, pointing to the GOP’s disappointing performance in last year’s midterm elections when several candidates endorsed by the former president went down to defeat.

“The president’s kind of high-profile endorsement of those candidates actually hurt those candidates, at least in the general election. So if past is prologue, that means President Trump is going to have a hard time in those swing states, which means that he cannot win a general election,” he told CNN’s Jake Tapper on “State of the Union.”