I going to go out on a limb here. If Trump wins and wins bigly, like a total rout, the left will have no choice but to expunge radical communist elements out of their party, (much like we did to the neo-cons) as a matter of political survival. They will have no choice.
Commies will fo third party and the Far-left will be perpetually divided, and JFK Dems will return
Art of the Deal