Republican presidential candidate, former Massachusetts Gov. Mitt Romney talks to reporters on his campaign plane before taking off for Boston, Tuesday, March 6, 2012, in Columbus, Ohio. Romney has won the Virginia Republican primary on Super Tuesday. (AP Photo/Gerald Herbert)

Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney talks to reporters on his campaign plane before taking off for Boston, Tuesday, March 6, 2012, in Columbus, Ohio. Romney has won the Virginia Republican primary on Super Tuesday. (AP Photo/Gerald Herbert)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney talks to reporters on his campaign plane before taking off for Boston, Tuesday, March 6, 2012, in Columbus, Ohio. Romney has won the Virginia Republican primary on Super Tuesday. (AP Photo/Gerald Herbert)
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