Republican presidential candidate, former Massachusetts Gov. Mitt Romney, greets supporters during a 

Republican presidential candidate, former Massachusetts Gov. Mitt Romney, greets supporters during a campaign stop in Portsmouth, Va., on Thursday, May 3, 2012.  (AP Photo/Virginian-Pilot,Ross Taylor)
Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, greets supporters during a campaign stop in Portsmouth, Va., on Thursday, May 3, 2012. (AP Photo/Virginian-Pilot,Ross Taylor)
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