Per my blog of yesterday

Needless to say, my analysis of yesterday concerning Biden successors applies equally to Bernard Sanders: an old man with a bad heart (for what is probably the most stressful job in the world). In his case, squared--because plus the "normal" tensions of the presidency, he would be busy "transforming" (there's that word again) the United States of America.

So, imagine Bernard gone. And then try to imagine who the next presidents and vice presidents would be.

My point is that this election will be between Donald Trump and two known and potentially two unknown presidents and vice presidents.

And for some frosting on the cake, only a solidly Republican Senate could block such a disaster.
(See Collins, Romney, et al.)