George W. Bush.
Over the weekend, Gail Collins suggested that Bush and Cheney resign and let Nancy Pelosi become the interim President, figuring that she would, in essence, commence the Obama administration.
More simply and more practically, Tom Friedman suggested Sunday that W appoint Timothy Geithner Treasury Secretary immediately, so that the Obama team can start managing the economy at once.
Both sensible, if drastic, suggestions. Neither of them will be tried, of course.