FILE - Former CEO of Godfather's Pizza Herman Cain is seen at the Iowa Faith and Freedom Coalition, in this March 7, 2011 file photo taken at the Point of Grace Church in Waukee, Iowa. The 65-year-old Cain will try to see if he can use grass-roots enthusiasm to turn a long-shot presidential campaign into a realistic bid. He plans to announce his candidacy at a rally in Atlanta on Saturday May 21, 2011. (AP Photo/Charlie Neibergall, File) The Associated PressATLANTA (AP) — Businessman Herman Cain has joined the growing field of Republicans who want to be president.He made the announcement at a rally in Atlanta and was greeted by cheers of "Herman."Cain said, "I'm running for president of the United States and I'm not running for second."Cain supports a strong national defense, opposes abortion, backs replacing the federal income tax with a national sales tax and favors a return to the gold standard.He's never held elected office. His "Hermanator" political action committee has taken in just over $16,000 this year.