During the Republican presidential debate on Saturday, Mitt Romney challenged Rick Perry to a $10,000 bet over the former Massachusetts governor's position on individual mandates. "And Perry said, "'I'm not a betting man,'" Conan O'Brien said on Monday. "Perry also said, 'I'm not a spelling man, a reading man or an adding man.'" Don't miss today's Must See Moment at 1:47 when David Letterman spoofs Perry's ad that goes after the "war on religion:"