I think he talked about being a Republican and voting for Gore in 2000 on Sunday's Tim Russert show.
Thanks -- with that info I found it. I didn't remember it was Russert.
http://www.freerepublic.com/focus/f-news/1106797/posts MR. RUSSERT: And we're back. Did you vote for George Bush in 2000?
MR. CLARKE: No, I did not.
MR. RUSSERT: You voted for Al Gore.
MR. CLARKE: Yes, I did.
MR. RUSSERT: In 2004 you'll vote for John Kerry?
MR. CLARKE: I'm not going to endorse John Kerry. That's what the White House wants me to do. And they want to say I'm part of the Kerry campaign. I've already pledged I'm not part of the Kerry campaign and I will not serve in the Kerry administration.
MR. RUSSERT: Will you vote for him?
MR. CLARKE: That's my business.