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



DES MOINES, IA - NOVEMBER 04:  Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign rally at the Hy Vee Center on November 4, 2012 in Des Moines, Iowa. With two days before election day, Mitt Romney is campaigning in swing states across the country.  (Photo by Justin Sullivan/Getty Images)

DES MOINES, IA - NOVEMBER 04: Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign rally at the Hy Vee Center on November 4, 2012 in Des Moines, Iowa. With two days before election day, Mitt Romney is campaigning in swing states across the country. (Photo by Justin Sullivan/Getty Images)