Ari might be a real problem for Libby.
Fitzgerald still has to prove beyond a shadow of a doubt that Libby deliberately lied to the Feds. Frankly, having Fleischer testify doesn't prove that one way or the other. Just because he makes a statement over lunch, it doesn't mean he remembered that statement months later, especially since the lunch consisted of other topics as well. Just because I know a fact, doesn't mean I remember when or who I told it to in a casual lunch conversation. Fitzgerald is grasping at straws.