In an interview on CNN, Sen. Bob Casey (D-PA) said that Democratic party leaders should not be telling candidates whether or not to challenge Sen. Arlen Specter (D-PA) in a primary next year.
Said Casey: "I don't think anyone in our party should ever dictate to a candidate. That's really up to that candidate, to run or not run."
Nonetheless, Casey already endorsed Specter "no more who runs against him."