acting with the authority of the US Attorney General to investigate?
He has full budget authority...
He does not ask permission from anyone at the DOJ...
WHY CAN'T FITZGERALD BE FIRED AS SPECIAL COUNSEL?
First, let me make it clear that Patrick Fitzgerald, while wearing the hat of US Attorney for the Northern District of Illinois, can indeed be fired or replaced by President Bush. There's no doubt about that.
But Fitzgerald wears a different hat pertaining to Treasongate where he is the "Special Counsel" "Acting" and vested with the "full authority" of the "US Attorney General" to prosecute Treasongate. And as such, nobody in the Department of Justice can touch him.
Not only was it Comey's intention to prepare Fitzgerald for the coming assault on his legally mandated plenary authority by vesting him with
complete autonomous rule, but the GAO, through their approval of "permanent indefinite appropriations" to perpetually fund Fitzgerald's office, at the request of the Justice Department, has made a strong legal argument, in Decision B-302582, that Fitzgerald has all of the protections and authority normally granted to an independent prosecutor under the expired independent counsel law.
http://citizenspook.blogspot.com/2005/08/treasongate-us-attorney-generals.html