That Would Be Cool

For the first time in what seems like forever, we don't have a President or Vice President as a candidate in a Presidential election.

It made me think, we have had Presidents run against former Vice Presidents (Reagan versus Mondale, for instance), but what would be really interesting is if, in our modern era, a sitting Vice President ran against his own President for the party's nomination . It would be a tricky switch, of course--if the President is so unpopular, how popular could his Veep be? Still, it'd be cool.