Liberal humorist Al Franken lashed back at Fox News on Tuesday over a lawsuit it filed claiming he infringed on its "fair and balanced" trademark by using the phrase in the title of his upcoming book. In the suit, Fox said Franken has become "increasingly unfunny" and called him "shrill and unstable," among other things. Responds the former SNL star: "When I read 'intoxicated or deranged' and 'shrill and unstable' in their complaint, I thought for a moment I was a Fox commentator."