New York City Mayor Zohran Mamdani’s endorsed slate of Marxists won their Democrat Party primaries last night. All three will be elected to Congress in November from their heavily Democrat districts. When Mamdani endorsed these Marxists, it’s notable that he approvingly quoted an Italian communist leader from the 1920s. These results should be a “wake-up call.” It would be a dangerous mistake to dismiss these leftist victories as a fluke isolated to left-wing New York City. This rot is spreading to every city.