Aides to President Bush have said they will cooperate with a Justice Department investigation into who in the White House illegally revealed the identity of a CIA agent in an attempt to smear a chief critic of the Iraq invasion. A senior administration official told the Washington Post that six reporters were contacted by White House officials and told that the wife of former diplomat Joseph Wilson was a CIA agent. The Post also revealed this weekend that CIA head George Tenent has called on the Justice Department to probe who leaked the information.