GOP presidential debate

Associated Press
FILE - In this Oct. 12, 2006 file photo, then-Sen. Rick Santorum, R-Pa., left, and his opponent Democrat Bob Casey confront each other during the taping of a debate at the KDKA television studio in Pittsburgh. Republican presidential candidate Rick Santorum is as unpopular in Pennsylvania today as he was six years ago, when home-state voters kicked him out of the Senate in a rout. That sour public perception may doom his fading chances of sticking around in the GOP presidential race, along with other hurdles that dot his path to a possible, and needed, victory in the April 24 primary. (AP Photo/Steve Mellon, File)

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Republican presidential candidates face each other in a series of debates. On Wed., Nov. 9, Texas Gov. Rick Perry struggled to remember the names of the three federal agencies that he would eliminate if elected president. "Commerce, Education and the — what's the third one there? Let's see," Perry said.

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