This was the week that Bernie Sanders ran smack into a great American myth. That myth is that the United States nobly won the Cold War, which was a black-and-white clash between the forces of good and free enterprise (us) and the forces of evil and communism (them). Sanders’ dabbling in Cold War politics, when he was mayor of Burlington, Vermont, became campaign fodder, as he solidly assumed the frontrunner position in the Democrats’ presidential nomination race.