As the Democrats frantically jettison ballast from their sinking campaign ship, isn't he the obvious choice to get rid of, and add Hillary to the ticket?
This would get Bill to shut up now, and position Hillary to be the front running candidate for the next election. It would also explain President Clinton's erratic comments of late.
0bama would offer it because it provides him a scapegoat, and a tangible improvement over who he has now. She is also more popular with the voters of both parties than either of the incumbents are.
She would take it, because she wins either way. Either she becomes the Vice President and the highest ranked re-electable Democrat in the country, or she is the voice of the loyal opposition for 4 years, and leads the Democrats into 2016.