Is Roger Ailes thinking about stepping down from his gig as chief of Fox News? That’s a possibility, New York Magazine says in a report about his plans to write an autobiography as he enters “a legacy-burnishing phase of his career.” The magazine cites unnamed sources with “direct knowledge” of the situation who say Ailes, 71, could net an advance of as much as $4M from Rupert Murdoch’s HarperCollins. Ailes is being repped by Washington lawyer Bob Barnett. Fox News contributor Jim Pinkerton, who worked with Ailes on George H.W. Bush’s 1988 presidential campaign, will be co-author. Ailes’ contract at Fox expires in summer 2013.