LSSBB
Devilish Dictionarian
This is all looking back to the future territory. However, in my opinion, Sanders would have gotten totally trounced by Trump. The opposition to him would have energized even more conservatives who found Trump odious, to vote against Sanders, and many who found Hillary tolerable would abandon Sanders.That would only be true if Bernie Sanders were running against a Democratic nomination as well as Trump.
However, if Bernie Sanders won the Democratic nomination, then the only thing that needs to be true is that a few thousand voters in the rust belt states vote for him instead of Trump. Trump only won by a small margin in swing states, not because of a "vast, hidden pool" who stayed away.
That said, I am not arguing that Sanders would definitely win. His age and his long track record will certainly be exploited by his opponents.
All guesswork. Not going to argue it, because it's a pointless exercise in mass mind-reading.