From CNN's State of the Union. Bob Corker doesn't want to talk about whether Dick Cheney's recent appearances in the media are helping or hurting the Republican party. All I can say is more power to them if they'd like for Cheney to be their public face and are afraid to criticize him.

KING: Let me ask you a question in closing. We're out of time, but one of the Republicans out quite frequently, to the surprise of many, has been the former vice president. He came in here, Dick Cheney, about six weeks ago and said President Obama is making the American people less safe. He's been on the radio this past week getting involved in a debate within your party about what next, and he'll be back out today.

Is Dick Cheney being so visible helpful or hurtful?

CORKER: I think it's important for everybody who has the ability to communicate ideas to be involved. I don't really give editorial comments about whether people are being positive or negative.

Look, Arlen -- the change there -- I'll get back to that -- certainly was a little bit of a solar plexus blow. I mean, to say that it wasn't, it was.

But I don't think it had anything to do with the Republican Party. He was very transparent about the fact that on Friday, he met with his pollster. His pollster told him he could not win as a Republican, so on Monday, he came in and told Mitch he was going to be a Democrat.

Now, I like -- I like Arlen fine, but let me just say, John, after 30 years of service, if you see me -- I hope that isn't the case for me, but after 30 years of service, if you see me taking a poll and switching parties, give me a call, if you will.

KING: We need to end it on that. Senator Bob Corker, Senator Bob Casey, gentlemen, thanks both for coming.