Reading the indictment, it’s clear to me, at least, what Libby’s purpose was in making such stupid lies. Delay.
Ignoring the issue for just a moment as to whether he actually committed the underlying crime, there’s no reason to increase your jeopardy and get hit with charges like this. All you have to do is keep your story straight. Especially since some of those who were on the other side of the story were outside the administration and therefore unlikely to lie to protect him, there’s not much reason to do it… except, to stall. Just imagine folks, if this had come out a year ago. Then things might have really been different.
Circumstantial facts make it clear that he knew Plame was covert, but that charge isn’t in there. Poor Scooter. You think they’re going to stick by you?