Republican presidential candidates from left, former New Mexico Gov. Gary Johnson, former Pennsylvania Sen. Rick Santorum, former House Speaker Newt Gingrich, Rep. Ron Paul, R-Texas, Texas Gov. Rick Perry, former Massachusetts Gov. Mitt Romney, Rep. Michele Bachmann, R-Minn, businessman Herman Cain and former Utah Gov. Jon Huntsman gather prior to a debate, Thursday, Sept. 22, 2011, in Orlando, Fla. (AP Photo/Phelan M. Ebenhack, Pool)

Photo by: Phelan M. Ebenhack

Republican presidential candidates from left, former New Mexico Gov. Gary Johnson, former Pennsylvania Sen. Rick Santorum, former House Speaker Newt Gingrich, Rep. Ron Paul, R-Texas, Texas Gov. Rick Perry, former Massachusetts Gov. Mitt Romney, Rep. Michele Bachmann, R-Minn, businessman Herman Cain and former Utah Gov. Jon Huntsman gather prior to a debate, Thursday, Sept. 22, 2011, in Orlando, Fla. (AP Photo/Phelan M. Ebenhack, Pool)