My take: Fitzgerald is fixated with Mrs. Wilson in fact being a classified and/or covert CIA employee...I believe a substantial case can be made that Mrs. Wilson was in no way classified/covert beyond her CIA personnel file.
The CIA suspected, but could not prove, that Aldrich Ames had revealed her identity to the Russians.
Also the CIA itself blew her by sending some documents revealing her identity by sending improperly secured documents [which they admit the DGI read] to the U.S. Interests section of the Swiss Embassy in Havana.