Bernie Sanders has earned Democracy for America's endorsement in the 2016 Democratic presidential primary with an astonishing, record-breaking 87.9% of the vote (including 77.8% of voters who were already members of DFA prior to the poll being launched on December 7).That's interesting. In 2008 the Dean PAC didn't take a stand on Clinton v. Obama either way, perhaps out of a fear that the split was too divisive for them to survive taking a side. Even if we restrict the field to those who were longstanding members of DFA, though, better than two thirds favor Sanders over Clinton.
It's very far from the whole Democratic party, and Clinton has locked up the superdelegates. Still, it's a fascinating display of support for the insurgent.
UPDATE: Communications Workers of America, a major union, has also endorsed Sanders based on a survey of members. Doubly interesting.