Peter Van Buren discusses yet another development in the “Russiagate” story, one that he says exposes the whole thing for what it really is. He describes the way “media watchdog” groups will discover small, insignificant websites, come up with an excuse for why they seem to be connected to Russia and then get large platforms like Facebook and Twitter to ban those sites in the name of truth and accuracy. Then mainstream publications like the New York Times will run stories about the bans, and...