Well, according to Rush Limbaugh he is. Limbaugh accused Fox of acting up and pretending that his shaking was much worse than it really is in order to gather support for his stand on Stem Cell Research. What a scumbag. I'm sure that it would be easy for Fox to enhance his shaking, but I'm also sure that he isn't. He's a strong believer in what he is doing, and it isn't easy for him.
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Rush Limbaugh has been around a long time, and really should know better than to say what he has said: it really is putting your foot in your mouth.