Dream Ticket?

The Clinton campaign has been pushing the idea of a Clinton/Obama ticket lately. I can see why; if they win the nomination they need him to undo the damage they've been doing to the party. Obama on the other hand probably would not have his campaign enhanced by Hillary being VP. Instead, if he gets the nomination, it probably would be a liability in his campaign against McCain. Also I doubt anyone would want a former president to be the ... um 2nd gentleman.*

Whatever do you call the spouse of the Vice President?