He has no such power. Elections are held by the States. It's straight up black and white in the Constitution. POTUS is not king and does not have unlimited power like you suggest.

I mean FFS can you imagine a President Biden making those rules? Or Harris?? You'd never have a POTUS that wasn't Democrat ever again.

Any power you'd place in the hands of Trump now will one day be in the hands of a leftist Democrat. You DO NOT want that, no matter how righteous you may feel right now. The leftists who will march your ass right onto the railcars would feel the exact same righteousness as they send you to the reeducation camp.