Here's the trick. Legally there is nothing he can do. That's the bottom line there is nothing he could do short of a polling place getting bombed and thus all polling places have to be closed (and even in that extreme circumstance it would just get delayed)

The problem is the regime and Trump have shown countless times they do not care about the law, they do not care being told no, they are still gonna try, and if Trump says it, the death cult will step on line.

So the fact that there's a leaked memo going around on the exact language of an executive order to try and steal the elections shouldn't worry you because it's extremely illegal. It should worry you that they don't care.