He's already started talking about a third term. I think it's pretty damn clear that if he does get in again, then he and the rest of the Republican Party will start to dismantle American democracy.
Trump is the vehicle though, not the driver. If he gets in, project 2025 goes into action, the mechanism of government is dismantled, and the hold of the corporate sponsored chrisofascists becomes almost absolute.
It's been done since forever. Trump will win in November.