How tight is Woodward with Powell? I don't trust Armitage, but he wasn't in the Whitehouse and this leak is said to come from the Whitehouse and not been Libby or Rove -- which leads me to think Card.
Which member of the President Bush 43 admin was in the halls of power the longest? Head of the Joint Chiefs, Sec of State, Nat Security Adviser...who would have the most current (at the time) and long term contacts with the media? Who was the media's darling before McCain and even afterward. Remember Powell stating the speech before the UN was the low point of his career? Who felt he had the most to lose integrity, credibility and reputation wise?