Democratic presidential primary front-runner Sen. Kamala Harris (D-CA) recently told reporters at a campaign stop in New Hampshire that she is “not a Democratic Socialist.” The next question should have been obvious: “Well, then, what kind of socialist are you?” Harris has been surrounded by socialists and communists her entire life—beginning with her staunchly Marxist father. Harris is the older child of two 1960’s Berkeley radicals: Shyamala Gopalan, a cancer researcher from the state of Tamil Nadu in southern India, and Donald J. Harris, an economist from Jamaica. Gopalan and Donald Harris were very active during the civil rights and...