By the logic you just stated, if the Red Chinese got one of their sleepers in as a Republican, we should kp him because he is a Republican.
Whne an enemy is wihin the gates, and he desses like you and has influence, he is MUCH more dangerous that an enemy outside the gates.
I know that you should give every benefit of a doubt...Specter has used up all of that and more. He must go. While I would not vote for the demo...I would also not vote for Specter (for the same reasons) and therefore cast my vote for whatever candidate reflected my values.
I've said all I can on this...we are getting into circular discussions and arguements now.