From the Washington Post:
Bush has been a major critic of leaks of classified information, and his aides have repeatedly said they want to “get to the bottom” of who leaked the name of Wilson’s wife, covert CIA operative Valerie Plame, to the media, which touched off Fitzgerald’s investigation . But in the past 33 months the White House has never disclosed Bush’s apparent involvement in the deliberate disclosure of information meant to undermine Wilson.
Here.