Were establishment Democrats particularly pro-wikileaks during the Manning releases? I don't recall that - in general both parties have been pretty much anti-whistleblower and pro-secrecy.

If anything the Republicans (particularly pro-Trump factions) have been awfully hypocritical on this stance since they've previously called for various leakers (Snowden in particular) to return home and face the death penalty. They definitely previously referred to Assange as a criminal and a threat to national security, but I guess as long as he's anti-Hillary he's a hero?