OVP (Office of the Vice President) contacted State in late May and CIA in June 2003 for info. (This info previously came out in Libby's indictment, pretrial motions and documents, and also testimony at trial by Grossman, formerly of the State Dept, and Grenier of the CIA.)
State Dept had been involved in researching (and debunking) the Niger claims. Grossman at State Dept asks for info from State staff and gets info/memo which includes mention of Valerie Wilson, a CIA WMD manager, at the Feb 19, 2002 meeting at CIA where it was discussed whether or not to send Joe Wilson to Niger. (State Dept reps present at the meeting didn't think it was necessary to send Wilson since they had already debunked the Niger claims.) This classified State Dept memo contains the info that Grossman will use to verbally brief Libby. The memo is also sent to the OVP, around June 11.
The unclassified State Dept memo, dated June 10, 2003, is available in .pdf format from this direct link:
http://truthout.org/imgs.art_01/fordmemo.pdfThis memo also goes to the State Dept's Office of Secty since it's going to the OVP/WH. (That wouldn't be an unusual thing IMO given gov't bureaucracy.) Armitage, the Deputy Secty of State, sees the memo and that's how he knows Wilson's wife works at CIA and allegedly was involved in sending him to Niger. He blabs about Wilson's wife at a June 13 mtg with Bob Woodward who's working on "Plan of Attack." Woodward doesn't publish the info, claims he told Walter Pincus at WaPo who says he doesn't remember Woodward telling him anything. Later (July 8) Armitage mentions it to Novak who does go with it, gets Rove to confirm, according to both Novak and Rove. Armitage is not buddies with the OVP and so far nothing to indicate he was in on the OVP's coordinated plan to attack Wilson. He may have had his own reasons to be irked at Wilson, as David Corn has suggested, without being involved in the OVP's mania about Wilson.
Meanwhile, the CIA also gets back to the OVP in early mid June, briefing Libby about the Niger trip and mentioning Wilson's wife. Likely Cheney also was directly briefed by CIA on this since Libby's notes say Cheney told him that Wilson's wife worked in the CIA's Counterproliferation Division (CPD).
(Larry Johnson has written that it wasn't the May NYT Kristov article mentioning the anonymous ambassador's trip to Niger but the Walter Pincus WaPo article the OVP knew was coming that had the OVP in a Wilson frenzy. Pincus apparently had rattled some cages via his inquiries when he was preparing his article that was published June 12. The gist was that info that didn't support the Administration's agenda toward Iraq was buried and info/claims that did support their agenda, however dubious and false, was put forth as fact by the Administration.)
June 23: Libby meets with Judy Miller, mentions Wilson's wife at CIA. Libby furious with CIA "leakers" likely a reference to the Pincus article and others.
July 7: Libby suddenly uncharacteristically buddies up to Ari and they have lunch. Ari says Libby tells him that Wilson's wife works ii the Counterroliferation Division at CIA.
July 8: Libby meets again with Miller, again mentions Wilson's wife at CIA...working at WINPAC (although Libby had been told by Cheney, according to Libby, that she worked at the Counterproliferation Division in the Directorate of Operations whereas WINPAC was in the Directorate of Intelligence). Libby also leaks still formally classified portions of the Iraq NIE, the ostensible reason for the meeting with Judy.
July 8: Armitage tells Novak about Wilson's wife at CIA. Rove is then Novak's second confirming source "Yeah I heard that too," according to both Novak and Rove. (Note: the Feds were suspicious that the Novak/Rove cooked up a story about their conversation but couldn't prove it since they each confirmed the other's story.)
July 10: Libby calls Russert to complain about Chris Matthews. Libby claims Russert tells him that Wilson's wife works for CIA. This is Libby's initial cover story that he first heard from reporters about Wilson's wife. (Russert later says he didn't know about Wilson's wife until Novak's July column and he and Libby never discussed her.)
July 11: Rove says he meets with Libby and tells Libby that Novak knows about Wilson's wife and intends to publish. Rove claims Libby told him that Russert had told him about Wilson's wife.
It's still not clear when and how Rove first knew about Plame. He was Novak's confirming source on July 8 according to both Novak and Rove . Last that we know Rove still fuzzily claimed he think he first learned of Plame from a journalist but can't remember who or when.
Meantime on July 11, Matt Cooper of Time mag calls Rove and Rove tells him that Wilson's wife works at the CIA.
Also on July 11: During Bush's trip to Africa, Ari Fleischer said he told journos John Dickerson and David Gregory about Wilson's wife. Neither do anything with the info. Dickerson much later publicly writes that Ari didn't mention Wilson's wife, Ari just said to look into the origin of the Niger trip, who really sent Wilson.
July 12: Cooper plays phone tag with Libby and when they connect in addition to giving Cooper an on the record statement that Cheney wrote for Libby, off the record when Cooper tells him he's been told Wilson's wife works at CIA, Libby confirms that: "Yeah, I heard that too."
July 12: Libby has 2 phone conversations with Judy Miller. Follow ups to their previous discussions.
July 14: Novak's column "outs" Valerie Plame.
There's much more info and more coming out in the course of the trial. Much we still don't know and likely won't.
Difficult to determine who among the leakers may have actually known that Valerie Wilson was covert. Info is classified for many reasons. A mention of a CIA employee in a classified memo on the Niger issue in itself doesn't mean that the person is covert, whether under official cover or nonofficial cover (NOC).
Lbby's apparently told that Valerie Wilson was employed in the CIA's Counterproliferation Division and Ari says Libby told him the same. Was everyone in the CPD a NOC? Suspect not. Were all CPD employee's identities classified? We don't know. Should the info have been considered at the miminum sensitive by all these folks until known to be otherwise and not mere fodder for the press? Yes.
Joe Wilson seemed to tend to think (in his book) that Rove didn't know her covert status. Ari may have been highly visible to the public as WH Press guy, but was really a low person on the WH totem pole, it's likely as he claimed didn't know CPD at CIA from his elbow or the potential sensitivity of the info he was told.
So far from what has been made public record, the two most likely in a position to learn or be able to figure out the potential sensitivity of her identity would be those with the most authority to get the info and who had been riding the CIA for info for a long time: Cheney and Libby. They'd been involved in intel matters for years and were quite familiar with the CIA, its structure and operations (enough I'd wager that Libby would not accidently "mistake" CPD with WINPAC as he did in his conversation with Judy Mller). That Cheney and Libby knew or had reason to know that Plame's identity was a sensitive matter and had an obligation to check whether or not it could be released I think is indisputable. (And no, Cheney did not have the authority to declassify a CIA officer's covert identity and, contrary to some posters' assumptions in some of these threads, neither Libby or Cheney have claimed the OVP had such authority or did so.)
We still don't know about other possible sources of info. Or who else was playing telephone with the press on this matter. We haven't heard in public court docs much of anything as I recall regarding NSC staff. Anyone there who may have (previously) known of Valerie Wilson nee Plame in her earlier CIA employment? Novak claims he got the name "Plame" from "Who's Who." (Recall when he walked off a CNN program on the air when he saw a copy of "Who's Who" on the anchor's desk?) Did Novak actually search for info, learned Wilson's maiden name and just decided to use it in his column or was he fed her old name by one of his sources and just ran with it.
Anyway, there were several sources for Plame's identity that we know of and likely still others we do not. What we do know so far is that it was the Office of the Vice President that was making the inquiries that led to the info about Wilson's wife's employment at the CIA being disseminated to and within the OVP/WH and to certain members of the media.