secretary of state. more important, he says he wants the presidency more than secretary clinton does. that, biden says, the vital difference between he and hillary clinton. he loves politics, loves the presidency, and she doesn't love either anywhere as much as he does. actually, does anybody? one thing he clearly loves is sitting down face-to-face, biden does, with world leaders. who wouldn't? david cameron. angela merkel of germany and all the other world leaders. why shouldn't he be considered as obama's successor, he is asking? why should hillary clinton get first dibs when he has the edge and years of service, high level meetings with world leaders, the works? tonight we out the what could be the democratic super bowl, biden versus clinton in a regulation 15 rounder. glenn thrush wrote the big story in politico. he joins us. and howard fineman, editorial director of "the huffington