Rick Santorum, a former Romney rival as well as a former senator from Pennsylvania, also believes "Pennsylvania is in play," citing Gov. Scott Walker's win in Wisconsin last week.
"If you saw what happened in Wisconsin, Pennsylvania is as much of a swing state, if you will, as Wisconsin is, and we saw the reaction of having a principled conservative stand up and boldly lead and I'm very hopeful that's the message that will be delivered by Gov. Romney as we head down the stretch here," Santorum told CNN's John King, in the same interview he gave quite a tepid backing to his former opponent. "The economy in Pennsylvania is doing a little better because of the energy economy in our state. Barack Obama is not energy friendly and that's not going to play well in major parts of our state and I think that's one of the reasons it will stay in play."
But don't expect Santorum to be campaigning with his former foe in his home state Saturday along with Pawlenty. The Romney campaign has not reached out to Santorum to campaign with him, including not extending an invitation for this weekend. The two have not been on the trail together since Santorum endorsed Romney last month.
ABC News' Elizabeth Hartfield contributed to this report. This story has been updated since it was originally posted.