It seems that Arianna Huffington has run up against the impenetrable wall that is Tim Russert's ego. Huffington, who is currently on tour for her new book Right Is Wrong: How the Lunatic Fringe Hijacked America, Shredded the Constitution, and Made Us All Less Safe, will be appearing on CNN, ABC, and CBS. She had been booked on Morning Joe and Countdown with Keith Olbermann as well, but those bookings were suddenly and inexplicably canceled.

NBC confirmed that Huffington wouldn't be booked on any NBC-affiliated show to promote her book, but refused to explain why.

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