David Brock is the author of four political books, including "The Republican Noise Machine: Right-Wing Media and How It Corrupts Democracy," In his preceding book, "Blinded by the Right: The Conscience of an Ex-Conservative," a 2002 "New York Times "bestselling political memoir, he chronicled his years as a conservative media insider. Paul Waldman is the author or coauthor of three books on politics and media, including "The Press Effect: Politicians, Journalists, and the Stories That Shape the Political World," His last book was "Being Right Is Not Enough: What Progressives Must Learn Fro...