I know the South and you have to win the South. Mitt Romney didn't win the South when John McCain won the South and Mike Huckabee won the South. And I think that the reason he will have a difficult time winning the South is when he ran the first time he did not do a good job of communicating his religion.
Cain said that thanks to Romney's religion -- plus the "ankle braclet on called RomneyCare" -- Romney just can't win the nomination.
"You don't win South Carolina and Florida and Georgia, you can't win the nomination and then you can't win the presidency," Cain said.
The Romney campaign did not immediately respond to a request for comment.