He's one of the leftmost politicians in the entire country. And the electorate itself is not exactly ready to sing the Internationale. So you're here bitching for what?

"Voting for the more left of the two parties won't move them left!"

"Okay, vote for the leftmost candidate in the primaries."

"None of them were pure enough for me."

"Bernie is one of the leftmost figures in the entire country."

"Well, I did vote for him."

???

Did you vote for him expecting a Sanders victory wouldn't move the party left? Were you just having fun filling out your ballot?

Fuck's sake.