In 2006 , Democrat Bob Casey Jr. received 51 % of its vote when he unseated incumbent Republican US Senator Rick Santorum and Ed Rendell received 50.6 % of the vote against Lynn Swann .
Each of the three row - office statewide winners carried Columbia in 2008 .
In 2006 , Democrat Bob Casey Jr. received 51 % of Columbia 's vote when he unseated incumbent Republican US Senator Rick Santorum and Ed Rendell received 50.6 % of the vote against Lynn Swann .
Each of the three row - office statewide winners carried Columbia in 2008 .