I think part of the reason for Biden’s really sharp drop among independents is buyer’s remorse over electing his boss, mixed in with a certain sense of denial and hope that Obama can turn it around. They’re angry at the course of things since Barack took over, but aren’t ready yet to take out all their anger on the president and admit they threw their vote away last November. So many of the moderate swing voters still say they support Obama in general, but re-target that hostility at Clueless Joe, who is more someone to be mocked or pitied than someone who deserves lower approval ratings than the man at the top of last year’s Democratic ticket.