Casey Maintains A Commanding Lead In Pennsylvania

According to a new poll (.PDF) Democratic Senator Bob Casey holds a commanding lead against all would be 2012 challengers:

Bob Casey Jr. (D-inc): 50
Rick Santorum (R): 38
Undecided: 12

Bob Casey Jr. (D-inc): 51
Charlie Dent (R): 32
Undecided: 17

Bob Casey Jr. (D-inc): 48
Jim Gerlach (R): 34
Undecided: 17
(MoE: ±3.8%)

H/T - SwingStateProject