Herman Cain is supposed to announce his intentions today, and I think he'll give up. Not only because of the affair, but also because he's losing his mind. I envision him wandering aimlessly through hotel hallways -- naked -- searching for room "999" while muttering the same.
By the way, it's revealing that an affair is cause for Republicans dumping this guy, and repeated instances of sexual harassment where there are legitimate female victims isn't a cause for dumping him.