Weeks before the 1980 census officially began, the Federation for American Immigration Reform launched its campaign to exclude unauthorized immigrants from population counts that, according to the Constitution, must include the “whole number of persons in each state.”

JUN 20 1980, JUN 24 1980, JUL 23 1980; Items to look for when approached for Census data; Red-white-and-blue ID badge, shoulder bag are official census taker times.; (Photo By Ernie Leyba/The Denver Post via Getty Images)