No offense to any Cain supporters, but Herman wont even get the nomination in order to challenge Barrack. Hes slowly fading in the polls, and between his Clinton in disguise harrassment problems and the fact that hes obviously never owned a globe, makes him less likely every day to mount a serious challenge to BO.
Perhaps its a lesson to everyone, that what you do in your past life really does matter, and its probably best not to fall asleep in geography class if you want to be president someday.