Martin Luther King was never himself a Communist—far from it. But the FBI's wiretapping of King was precipitated by his association with Stanley Levison, a man with reported ties to the Communist Party. Newly available documents reveal what the FBI actually knew—the vast extent of Levinson's Party activities On October 10, 1963, U.S. Attorney General Robert F. Kennedy committed what is widely viewed as one of the most ignominious acts in modern American history: he authorized the Federal Bureau of Investigation to begin wiretapping the telephones of the Reverend Martin Luther King Jr. Kennedy believed that one of King's closest...