GOP presidential debate

Associated Press
FILE - In this Dec. 1, 2014 file photo, Louisiana Republican Senate candidate, Rep. Bill Cassidy, R-La., waits for the start of the final debate against Mary Landrieu for the Senate election runoff in Baton Rouge, La.  In 2002, a public hospital physician named Bill Cassidy donated to Democratic Sen. Landrieu's first re-election campaign. A year later, he used a newspaper letter to the editor to lambast Republican gubernatorial candidate Bobby Jindal as a disaster for Louisiana's health care system. Those days are past for Cassidy, now a Republican congressman who is favored to defeat Landrieu and win election to the Senate in this weekend's runoff election.  (AP Photo/Gerald Herbert, 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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