Trump recently said to an interviewer that win or lose, this is his last election.
The problem is of course, that even if he goes away, he's unlocked the door for the extremist nutjobs, goofballs and lunatics who will, for some time to come hold sway on the right.
In light of that, I think Liz Cheney is right.
Traditional Republicans may well have to form a third party and hope that enough of the droolers and knuckle-dragging trumpers will come back to their senses and leave those cultists to themselves.