Article Photos: Santorum sees chance for former rival Romney in Pa.



Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns at the International Exposition Center in Cleveland, Sunday, Nov. 4, 2012. (AP Photo/Charles Dharapak)

Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns at the International Exposition Center in Cleveland, Sunday, Nov. 4, 2012. (AP Photo/Charles Dharapak)