Had a thought this morning. There are probably a lot of Clinton supporters out there that feel that a vote for Hillary means you get Bill, too, with all the Dot-Com Age Good Times that go with him. To me, installing the same couple as "co-presidents" again, after they filled the two term limit of the 22nd Amendment, sounds a bit sneaky to me, even if the order of the pair is reversed, with Bill as "First Man".
However, this would set an interesting precedent. What if George W. Bush and Dick Cheney, in a remarkable show of solidarity with the LGBT rights community, decided to divorce their respective spouses, and then marry each other? Then Dick Cheney could run for president in 08, with George W. and Bill Clinton as the prospective First Ladies!