A big part of what makes some men rise to the top is ego and daring. That sometimes bleeds over into their personal lives, where it tends not to work out as well.
It’s an occupational hazard. I suspect Cain may hold out for a while, see how the polling goes, and if his Iowa ratings collapse he will probably bail.
I think Cain will never quit, he is too strong, he is a Christian with strong beliefs.
I bet if he was to be taken to a secret room under the Whitehouse and TOLD to quit...or else...
He would have just laughed and sang a song.