Still, if anyone could overcome his weaknesses, it's Perry, says O鈥機onnell. 鈥淚鈥檓 not sure that America鈥檚 ready for another cowboy president, but Rick Perry could certainly change that,鈥 he says.

Pat Sullivan/AP Photo/File
FILE - In this July 27, 2011, file photo, Texas Gov. Rick Perry speaks at a ceremonial bill signing for a new tort reform measure in Houston. According to Perry spokesman Mark Miner, the Texas governor will announce on Saturday, Aug. 13, that he is running for president.