"Now people are over this first black President thing," he said. "But there are some people who will say, 'I'm not going to vote for another black guy because this one didn't work out.'
Cain said a man who self-identified as an African American called into his radio show and said, "I can't believe you are sitting there praising our founding fathers. They had slaves. How can you talk so admirably of them?"
Apart from a failed 2004 run for the U.S. Senate in Georgia, Cain hasn't sought election to public office. Instead, he held a series of high-profile business positions that culminated with part ownership of the Godfather's Pizza restaurants. He left the company in 1996 and among other positions has worked as host of a radio program in Atlanta, where he espoused his views against abortion and in support of a strong national defense, a smaller government and a return to the gold standard.
Cain said his business success has left him wealthy, but not at a level where he could self-finance a campaign. Cain said he's eager to travel through Iowa and other early-nominating states, meeting one-on-one with voters.