It would be basically a replay of 1992, though Hillary would likely win by an even larger margin than did her husband because of the greater number of minority voters.
No one expects Bernie to run as a third party. If the GOP splits, and Trump runs third party then Bernie could split the Dem vote and run third party.
The might be the last election in American History...but it would be a hoot to watch.
Nah.
It's 1860.