Trump would need an amendment ratified by 3/4ths of both houses of Congress and 3/4ths of the states, which has a snowballs chance in hell of passing.
Otherwise, he'd need a military coup, which I'd rate at even less of chance.
Trump has even less holding him back than last time, which means he'll take even bigger swings, like Project 2025. I'm speculating that when many of those who voted for him realize he's actually going to do it and that it's going to hurt them, they're going to turn against him.
And yes, I do realize this may be wishful thinking.