Barack Obama laughs off charges of socialism. Joe Biden scoffs at references to Marxism. Both men shrug off accusations of liberalism. But Obama himself acknowledges that he was drawn to socialists and even Marxists as a college student. He continued to associate with Marxists later in life, even choosing to launch his political career in the living room of a self-described Marxist, William Ayers, in 1995, when Obama was 34. Obama's affinity for Marxists began when he attended Occidental College in Los Angeles. "To avoid being mistaken for a sellout, I chose my friends carefully," the Democratic presidential candidate wrote...