Republican presidential candidate Mitt Romney (center) greets a supporter as he arrives at the Richmond International Raceway on Saturday, Sept. 8, 2012, in Richmond. (AP Photo/Richmond Times-Dispatch, Dean Hoffmeyer)

Photo by: Dean Hoffmeyer

Republican presidential candidate Mitt Romney (center) greets a supporter as he arrives at the Richmond International Raceway on Saturday, Sept. 8, 2012, in Richmond. (AP Photo/Richmond Times-Dispatch, Dean Hoffmeyer)