Former Massachusetts Governor Mitt Romney, after winning the Iowa caucuses last night with just eight votes more than former Pennsylvania Senator Rick Santorum, showed today how unexpected an opponent Santorum is. Asked on MSNBC’s Morning Joe for two issues where Romney and Santorum differ, Romney couldn’t name one. “We really haven’t had much opportunity to get to know Rick Santorum on the issues,” Romney said. “Over the past several months, our efforts been focused on comparing and contrasting with Speaker (Newt) Gingrich, with Rick Perry, with Herman Cain. These are the guys who have led in the polls.”