Republican presidential candidate Mitt Romney greets workers as he campaigns at Carter Machinery Company, Inc., in Salem, Va., Tuesday, June 26, 2012. (AP Photo/Charles Dharapak)

Associated Press
Republican presidential candidate Mitt Romney greets workers as he campaigns at Carter Machinery Company, Inc., in Salem, Va., Tuesday, June 26, 2012. (AP Photo/Charles Dharapak)
Republican presidential candidate Mitt Romney greets workers as he campaigns at Carter Machinery Company, Inc., in Salem, Va., Tuesday, June 26, 2012. (AP Photo/Charles Dharapak)
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