Democratic presidential candidate, U.S. President Barack Obama (R) and Republican presidential candidate, former Massachusetts Gov. Mitt Romney (L) participate in the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government. (Photo by Win McNamee/Getty Images)