John Bolton said that Trump is "old and tired" in an interview with the Guardian.
The former national security adviser suggested that the GOP needs a "fresh face."
It comes after disappointment within the party following the midterm election results.
John Bolton, who was President Trump's national security adviser, said the former president is old news, criticizing him after the turnout of the midterm election and suggesting that the GOP needs a "fresh face."
"There are a lot of reasons to be against Trump being the nominee, but the one I'm hearing now as I call around the country, talking to my supporters and others about what happened on 8 November, is the number of people who have just switched Trump off in their brain," Bolton said Saturday in an interview with The Guardian.
"Even if they loved his style, loved his approach, loved his policies, loved everything about him, they don't want to lose and the fear is, given the results on 8 November, that if he got the nomination, not only would he lose the general election, but he would take an awful lot of Republican candidates down with him."
Trump, who announced he's running for office again, has faced backlash from members of the Republican party after the several candidates he endorsed flopped in the midterms.
Recently, former Former Attorney General Bill Barr echoed similar concerns during an interview with PBS saying Trump "has been fading for months now, and the recent midterm elections, I think have really popped his balloon."
Bolton insisted that people are looking at a candidate like Florida Gov. Ron DeSantis would be a contender for the 2024 nomination. The governor won reelection with a 20-point margin over Charlie Crist.
"DeSantis has had a very successful run as governor of Florida. He won re-election on 8 November with a big majority," Bolton told The Guardian. "A lot of people look to him as the next-generation candidate. That's one of Trump's biggest problems - his act is old and tired now."