Rick Perry said Thursday "it ain't a day for quitting nothing" after his big "oops" during the Republican presidential debate the night before. "Oh, shoot, no," the Texas governor said Thursday morning during a series of media appearances, when asked if his debate gaffe would propel him to pull out of the race. On Wednesday, Perry was on stage with rivals Herman Cain and Mitt Romney in Rochester, Mich., when the debate sponsored by CNBC turned into a comedy of errors. Perry was discussing the three government departments he wanted to cut but forget one of them in a major...