New York Magazine's Gabriel Sherman highlighted the ongoing "civil war" between Fox News host Bill O'Reilly and contributor George Will over O'Reilly's newest book, Killing Reagan, in a new report. Sherman interviewed executives at the network who call O'Reilly's books "a joke" and offered insight on a feud between Fox executives Bill Shine and Mike Clemente. The recent feud began after Will published a November 5 Washington Post column titled, "Bill O'Reilly slanders Ronald Reagan." In the column, Will called the book "nonsensical history and execrable citizenship," with a "preposterous premise" that "should come with a warning: 'Caution -- you are about to enter a no-facts zone.'" O'Reilly responded to Will's column later that night, calling it "libel," and challenged Will to come onto his show and attack him in person - a challenge Will accepted. Sherman's November 9 exclusive highlighted the "civil war" currently raging at Fox, noting the distain for O'Reilly and his Killing books and how the rift has strengthened the rivalry between Mike Clemente, who oversees the news division, and Bill Shine, who oversees the prime-time shows.