Check out this exchange from his appearance on The Situation Room this week:
BLITZER: Should the vice president hold a news conference or grant an interview and answer the tough questions that are being asked out there?
CARVILLE: I've got a better idea. Why doesn't the president get out and have one? Harry Truman didn't say the buck stops with the Vice President. The buck stops with the President.
....
I think the first step is not the Vice President -- [it's] the President of the United States standing up, answering to the American people, answering people's questions... The Vice nothing. There aren't no Vices around here. There's one man in charge of this country and that is George W. Bush.
Matalin is still - paid or unpaid-- an advisor to Dick Cheney. She was a member of the White House Iraq Group. She testified before Fitzgerald's grand jury. Grand jury witnesses aren't under a secrecy order. You can bet James knows what Mary knows.
It just doesn't wash that he should be considered an effective Democratic strategist when he bashes the war and Bush, but defends Cheney in PlameGate. There are some conflicts of interest that even Clorox 2 can't get out, and his and Matalin's is a prime example.