sentences:  After leaving the House, Maverick became an attorney for the American Civil Liberties Union, representing civil rights protestors, atheists, communists, and, during the Vietnam War, conscientious objectors and draft protestors.In 1964, in "Stanford v. Texas", he represented John W. Stanford Jr., a bookstore owner and Communist Party USA member convicted of sedition for selling books authored by Karl Marx, Jean-Paul Sartre, Pope John XXIII, and Supreme Court Associate Justice Hugo Black.The case was eventually heard before the Supreme Court (including Black) and became a landmark free speech case.