If you really want to know what will absolutely happen if he gets reelected, look into Project 2025.
https://www.newsweek.com/what-project-2025-trump-shadow-network-plans-overhaul-deep-state-1825780
The reason I think this will happen is it doesn’t really rely on Trump at all. He’ll just do what he’s told by these fascists and go along with it. Same thing he did before with the court packing, but this time on an entirely different level.
Removing career employees out of the federal government is how you actually remove the ability of the government to function. These are the people that actually know the rules AND FOLLOW THEM because if not their jobs are on the line. Unlike politicians, they can’t just lie to people and get back in power.