I believe Schweitzer has calculated that he has absolutely no chance with the Democratic Establishment and is basically telling them f**k you. That may play well with some of the anti-Hillary elements in our party, but those folks are very far from a majority of Democratic voters. Perhaps he is trying to consolidate them early before someone else can?
Schweitzer's tactics are starting to resemble the sledgehammer approach John Edwards took toward Hillary in 2008. And it probably contributed to her not getting the nomination. But Edwards didn't get it either and Clinton is a much stronger candidate now than she was in 2008.
One can only hope Bernie finds enough of a hole to win.
I like Sanders but realistically, he would be a weak general election candidate.