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MANCHESTER, NH - JANUARY 04: Former presidential nominee, U.S. Sen. John McCain (R-AZ) (R) announces that he is endorsing Republican presidential candidate and former Massachusetts Gov. Mitt Romney during a town hall meeting at Central High School January 4, 2012 in Manchester, New Hampshire. Romney beat former U.S. Senator Rick Santorum by only eight votes in Tuesday's 'first in the nation' Iowa Caucuses. (Photo by Chip Somodevilla/Getty Images)
MANCHESTER, NH - JANUARY 04: Former presidential nominee, U.S. Sen. John McCain (R-AZ) (R) announces that he is endorsing Republican presidential candidate and former Massachusetts Gov. Mitt Romney during a town hall meeting at Central High School January 4, 2012 in Manchester, New Hampshire. Romney beat former U.S. Senator Rick Santorum by only eight votes in Tuesday's 'first in the nation' Iowa Caucuses. (Photo by Chip Somodevilla/Getty Images)

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