If just one person in Joe’s cabinet to resigns over Joe’s senility, and its over. Just one person from the cabinet, gets up and says he can no longer support a President who is not there. That person will lose some friends. But will be a hero to many.
That's not going to happen. They knew the deal the past 4 years. Why change now?
The only difference now is that they got caught. Everyone can see that the Emperor is wearing no clothes.