In the town hall last night one of the questioners asked Bernie Sanders if he can promise not to be "beholden to anyone" when he takes office. He gave the $27 spiel and then said no (obviously).

But there are other kinds of deals that don't involve donations. Like deals with unions. I've never heard Bernie say he was against unions backing candidates. I wouldn't be surprised if he had some of them already on board. DId they commit just out of the goodness of their hearts? Or do they expect something in return?

Are unions part of the Establishment?