Paul Morrissey (director of many Andy Warhol films) once acknowledged that Comrade X was his favorite movie.
At the time this film was released, in 1940, World War II had already begun in Europe, but the Soviet Union still had a non-aggression pact with Nazi Germany. In the film, Mac is able to fool a character by pretending to hear news that Germany has broken the pact and launched an invasion of the USSR. Of course, that's exactly what happened the very next year when Germany launched Operation Barbarossa in summer 1941.