CNN obtained a 400-page opposition research file on journalist Gabriel Sherman, which was compiled for Roger Ailes as Sherman wrote a book about the ex-Fox News chief.

“It has all the markings of ‘opposition research’ about a political enemy — which is precisely how Ailes viewed Sherman. The memo, obtained by CNNMoney from two anonymous sources, is a stunning display of Ailes’ campaign-like strategies. It includes, among other things, property records, voter registration information, and a note that the researchers could find no criminal record for Sherman.”