"A revolutionary Marxist" is the way Belgian Economist Ernest Mandel describes himself. In 1962 and again in 1968, Mandel toured the U.S., lecturing at a number of universities. But because of his openly announced political creed, Mandel had to receive special clearance by the Department of Justice to make the trip.
Under a provision of the Immigration and Nationality Act (the McCarran-Walter Act) of 1952, the U.S. Attorney General has the power to decide whether Mandel is allowed into the country. His two earlier visits were authorized because the Justice Department decided...