Into the depleted field of journalism in America, a handful of websites have appeared in recent weeks with names suggesting a focus on news close to home: D.C. Weekly, the New York News Daily, the Chicago Chronicle and a newer sister publication, the Miami Chronicle. In fact, they are not local news organizations at all. They are Russian creations, researchers and government officials say, meant to mimic actual news organizations to push Kremlin propaganda by interspersing it among an at-times odd mix of stories about crime, politics and culture. While Russia has long sought ways to influence public discourse in...