In this Dec. 28, 2011 file photo, Mitt Romney signs an autograph during a campaign stop at Elly's Tea and Coffee in Muscatine, Iowa. (AP Photo/Chris Carlson)

Associated Press
In this Dec. 28, 2011 file photo, Mitt Romney signs an autograph during a campaign stop at Elly's Tea and Coffee in Muscatine, Iowa. (AP Photo/Chris Carlson)
In this Dec. 28, 2011 file photo, Mitt Romney signs an autograph during a campaign stop at Elly's Tea and Coffee in Muscatine, Iowa. (AP Photo/Chris Carlson)
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