I think they have no way to stop states from holding elections and counting ballots. If red state governors don't want to allow an election, then the landslide will just be bigger.
The GOP is absolutely treasonous, but they are also self serving. Right now, treason serves their greedy self interests. A lame duck Trump does not serve those self interests. You know as well as I do that parasites like Mitch are going to play this perfectly. They rode the Trump train until the tracks ended, and they are going to jump off it safely as it crashes. When Biden is President, they'll go back to being obstacles who bitch about nonsense, and pretend that they never agreed with Trump and were trying to stop him from the inside. Half of them will write books talking about how shitty Trump is. You can already see the screw turning. Suddenly, "fiscal responsibility" has become a term among GOP congresspeople again. That's because they are setting up to block Biden from delivering anything good to the American people.
And I get it, we are teetering on the brink. Personally, I think we already fell off the cliff. Biden is simply a parachute with holes in it. We are going to be quadriplegic on impact rather than dead. Probably better to be dead.