Bill O'Reilly's new Lincoln book 'an insult to scholars'

Former Nixon White House counsel John Dean slammed Fox News host Bill O'Reilly on Monday over his latest book about the assassination of President Lincoln.

The official Lincoln Museum at Ford’s Theatre has refused to sell the book because it is riddled with factual errors and lacks proper documentation.

“I stopped counting at 12 serious errors,” Dean said on Countdown with Keith Olbermann.

He said the book was an insult to "serious" writers who attempt to show scholarship in their work.

Watch video, courtesy of Current TV, below: