"Sheehan will flame out big-time"
Sheehan would be running in the San Francisco district, filled with loons. Pelosi, although I doubt she'd lose, would get an unpleasant wakeup call if Sheehan actually ran.
Sort of like that coming to Bush when he is no longer POTUS. It's gonna hurt to find out how insignificant he, personally, is.
In my experience, it's Democratic ex-politicians who stand outside the walls of power and claw their hands bloody on them when they leave.
It's quite obvious that Bush, unlike a lot of other politicians I could name, does not have a need to be liked and admired as his primary motivator.