He simply speaks his heart, and wins everyone else's.

During MSNBC Town Hall hosted by Chris Hayes:

Let’s talk about principle. Hundreds and hundreds of superdelegates parts of the Democratic establishment voted for Hillary Clinton, or chose to come on board her campaign before I even announced by candidacy, and those people have a right to rethink the decision that they made, and if they conclude that we are the stronger campaign for a dozen different reasons that we are a stronger campaign. And by the way, this is not just talking off the top of my head virtually every poll that’s out there as you know shows that Bernie Sanders does better against Donald Trump than Hillary Clinton does better against other Republican candidates. Should that be taken into consideration? Yeah, I think so.

he is going on to loss big tomarrow.

O........kay

The answer is no.

This is a separate question from the question of whether or not he would endorse her (and under what circumstances).

“We’re not a movement,” Sanders said, “where I can snap my fingers and say to you or to anybody else what you should do, that you should all listen to me. You shouldn’t. You make these decisions yourself.”