Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns at Stepto's BBQ Shack in Evansville, Ind., Saturday, Aug. 4, 2012. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns at Stepto's BBQ Shack in Evansville, Ind., Saturday, Aug. 4, 2012. (AP Photo/Charles Dharapak)