WASHINGTON, DC - NOVEMBER 22: Republican presidential candidates (L-R) Texas Gov. Rick Perry, former Massachusetts Gov. Mitt Romney, former CEO of Godfather's Pizza Herman Cain and former Speaker of the House Newt Gingrich participate in a debate at Constitution Hall November 22, 2011 in Washington, DC. The debate, hosted by CNN and in partnership with the Heritage Foundation and the American Enterprise Institute, was expected to focus on national security, foreign policy and the economy. (Photo by Mark Wilson/Getty Images)
