I doubt that it was Ari Fleischer, since the person is question is so often called a senior official. But I guess it is possible.
I guess it's also possible, maybe even more possible, that it is the same under secretary of state who allegedly told Libby.
I'm surprised at how little attention that person has gotten. I'm not even sure who it is. I see that it is largely assumed to be Grossman.
But then again, if it were the under secretary of state, why wouldn't he have told Fitz earlier -- unless he just remembered.
I also wonder if the person who talked to Woodward wasn't also Novak's source. Remember, he said we would be surprised at how it is. Which also makes me think it may turn out to be Powell.
He certainly is "no partisan gunslinger." And some say he is close to Woodward. (Don't ask me why.)