Never happen...but I can’t figure why she isn’t challenging him in the Primary. She’d whip him by a huge margin, and it could only help the RAT party.
Presidents usually defeat challengers because they have patronage and all the powers of incumbency. With the challenger party chiefs have to wait and hope to get their goodies. Sitting presidents can make the promises and carry them out now.
When a sitting president is challenged it's usually a bad sign for his party. Even if he beats back the challenge it's an indication the party is weak -- Bush 1992, Carter 1980, Ford 1976. If a challenger from the president's own party beats him, they'll be bad blood in the party and the coup could be taken as a sign that party's days in power are numbered.
The Hillary for VP thing sounds far-fetched, like the sort of thing people who don't know politics dream up, but that never actually happens. But pollsters have said that Hillary on the ticket could make the difference for Obama. It's just possible Oama might be tempted.