Wonder Who Official "A" Is...
From the indictment: "On or about July 10 or July 11, 2003, LIBBY spoke to a senior official in the White House ("Official A") who advised LIBBY of a conversation Official A had earlier that week with columnist Robert Novak in which Wilson's wife was discussed as a CIA employee involved in Wilson's trip. LIBBY was advised by Official A that Novak would be writing a story about Wilson's wife."
UPDATE: We are being facetious. Thanks to those of you who wrote in to suggest "Karl Rove."
Karl Rove