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new survey of Pennsylvania Republicans out by Public Policy Polling Wednesday night has the former senator trailing Mitt Romney in his home state 42 percent to 37 percent.

"The numbers represent a dramatic turnaround from when PPP polled the state a month ago. Romney's gained 17 points, going from 25 percent to 42 percent," the survey reads. "Meanwhile Santorum's dropped 6 points from 43 percent to 37 percent, for an overall swing of 23 points in the last four weeks.