Well, only sexist Big Dick Cheney thought she couldn't be, since she's a gurrrrl.
Or, well, actually Big Dick Cheney knew damn well she was covert, but didn't like it, because she's a gurrrrl.
Or because she was working on things that Big Dick didn't want competent people working on, especially not if they're gurrrls.
In any case, outing a clandestine agent is treason, is it not?
Or only for administrations that actually respect the rule of law?
Even according to Poppy Bush:
Those who compromise our clandestine operatives are "the most insidious of traitors."
Oh, and just in case you hadn't noticed, Fitzgerald asserts in his filing that Valerie Plame was working for the Central Intelligence Agency (CIA) in the Directorate of Operations (DO) on WEAPONS OF MASS DESTRUCTION related to IRAQ.
Killing two birds with one stone, were you, Big Dick?
Full story here.