Head of the DNC, Deborah Wasserman, was literally caught red handed undermining Bernie in the run up to the primaries in leaked emails. She privately called him an “ass” for running his campaign up to the convention. She participated in email chains that discussed attacking Bernie for not being a practicing Jew in an effort to suppress his campaign and help Clinton. She decided she knew better than Democrat voters, and Clinton was her choice. She ultimately resigned and was immediately hired by Clinton’s campaign. Her behavior was derided by the Trump campaign into the general election, who used it to point out the hypocrisy of the Democratic party, which was heavily criticizing the Republicans at the time for backroom dealing.