[GOPsterinMA]

No doubt (just look @ his history) that Castle is a RINO, and fingers crossed that Ms. O'Donnell wins, but is there proof that Castle would switch parties?

Specter was a Rat before becoming a RINO and back; I don't see that with Castle, he's always been a RINO.

Again, may the better candidate (Ms. O'Donnell) win, but where are these fears that Castle would switch parties coming from?

[muawiyah]

If Spector was a Rat before running as a Republican, he’s an authentic RINO. If he went back to being a Rat that’s their problem. This guy has never been a Republican ~ so he’s never been a RINO. He is, of course, a Leftwingtard puke, but no one asked him to switch to run as a Republican (as far as anyone knows).

[Gondring]

No doubt (just look @ his history) that Castle is a RINO, and fingers crossed that Ms. O'Donnell wins, but is there proof that Castle would switch parties?

No. It's just another accusation thrown out there in desperation, making Miss O'Donnell look more like a nutcase.