Pennsylvania Exchanging Right Winger for Populist

Rick Santorum's days in Washington D.C., at least as a U.S. Senator, are numbered.

Santorum trails State Treasurer Bob Casey Jr. 53%-38% in the most recent Rasmussen Reports Poll.

Casey, who is pro-life and proudly pro-gun, seems to have few political liabilities against Santorum, who has won in the past by trumpeting social issues to conservatives in rural and suburban Pennsylvania.