Nearly three decades ago, Barack Obama stood out on the small campus of Occidental College in Los Angeles for his eloquence, intellect and activism against apartheid in South Africa. But Mr. Obama, then known as Barry, also joined in the party scene. Years later in his 1995 memoir, he mentioned smoking “reefer” in “the dorm room of some brother” and talked about “getting high.” Before Occidental, he indulged in marijuana, alcohol and sometimes cocaine as a high school student in Hawaii, according to the book. He made “some bad decisions” as a teenager involving drugs and drinking, Senator Obama, now...
