How is Cain polling?
There haven't been any "official" polls released in 5+ months but the Cain people seem very confident they are in a firm second place. If there is a run-off between moderate republican Isakson and conservative Republican Cain, Cain has a good chance since Georgia is generally conservative. But Isakson has a lot of name recognition, so he has a chance of getting 50%+ in the primary.
Cain is polling 2nd. I don't know the margins....