The top-selling conservative author in the nation, Ann Coulter, has been banned from appearing on NBC for life. The reason behind the decision? Coulter taking the media to task for its pro-Obama bias in her new book, Guilty. For some reason, I doubt that this move will do anything to dispel her book’s claims.

But one network insider claims it was the book’s theme — a brutal examination of liberal bias in the new era — that got executives to dis-invite the controversialist.

“We are just not interested in anyone so highly critical of President-elect Obama, right now,” a TODAY insider reveals. “It’s such a downer. It’s just not the time, and it’s not what our audience wants, either.” …

Executives at NBC TODAY replaced Coulter with showbiz reporter Perez Hilton, who recently offer $1,000 to anyone who would throw a pie at Ann Coulter.

NBC: The National Barack Channel.