Last minute call for VP Clinton?

"You better not take the chair out of that office."

Mitt Romney takes the stage at the Republican National Convention in less than an hour, but one point bears mentioning. The Obama campaign has a single trump card left in its deck: the call for VP Hillary Clinton. The odds of a switch on the ticket this late in the game are astronomical, but on a night where Romney has taken an edge in some national poll (as irrelevant as they may be), it might be time for Chicago to play that card.

Let's look at the principles in the move, and what would justify their decisions.

Obama: Since we last checked in, there has been little movement in the country's economic figures, making it more likely that Obama is this year's insurgent candidate. This notion is confirmed by the lack of clear policy proposals emanating out of Tampa and the Obama campaigns focus on Bain Capital, Romney's tax return and other distractions. Picking Hillary would capture the headlines through the debates, and deflate whatever bump Mitt takes out of Tampa.

Clinton: Hillary has surely had a hectic decade, but I find it hard to believe she would turn down the invitation to be the country's first female Vice President, and the inside track on the party's nomination in 2016. Nobody says no to the President when it comes to joining him on the ticket, especially not a Clinton.

Biden: Joe is the clear loser here, but I don't see a scenario where he contributes much this fall, and they can cushion his landing by naming him Hillary's replacement at State.

In some respects, it's a desperate move. But this is the last election Barack ever needs to win, why wouldn't he use every resource at his disposal? Finally, if you think it's too late, don't forget what happened the day after the last opposition convention in a general election year.