Certain Republicans who have been, shall we say, difficult about Trump, have been awfully quiet, maybe a little smug. I honestly wouldn’t put it past them to try and get one of “their” guys in.
I think Trump is wary of this too. I also think that is part of the reason for him interviewing and even appointing some of the people he has. Romney of course, but also Haley and Chou come to mind.
It would take some trumped up revelation to attempt a reasonably successful EV coup. Something like hacked voting machines, or some other serious alleged wrongdoing. I don’t put it past the uniparty.