Washington (CNSNews.com) - Former conservative author-turned-liberal activist David Brock, whose new book and website are devoted to denouncing conservative media outlets, says network news personalities have privately praised him and told him, "Thank God you are doing this..." Brock, the author of The Republican Noise Machine: Right-Wing Media and How it Corrupts Democracy, told an audience of several hundred fellow liberal activists about off-the-air exchanges he has had with network news hosts. Brock spoke Thursday in Washington at the "Take Back America" conference, which is billed as a gathering of progressive activists. "In the past few weeks -- as I...