Bernie Sanders
In 1993, Sanders voted for a National Rifle Association (NRA)-supported bill to restrict lawsuits against gun manufacturers and against the Brady Bill.[22] Sanders is a co-founder of the Congressional Progressive Caucus, and chaired the grouping of mostly liberal Democrats for its first eight years.
EDIT; Thought it was Bernie Madoff LOLOLOL
Although his gun record isn't stellar, it's better than practically most Democrats:
Bernie Sanders' Voting Records on Issue: Guns - Project Vote Smart
And once again, Bernie Sanders isn't a Democrat. Never has been.