When long-term Chicago resident and World War II veteran Rodolfo Lozoya traveled to Mexico in 1957 to visit his ailing mother, he probably did not think that he would face the threat of permanent separation from his US citizen wife and children. But when he tried to reenter the United States, authorities excluded him from the country because of his alleged past membership in the Communist Party. The saga of Lozoya’s exclusion and his family’s separation offer insights into the hypocritical nature of democracy in Cold War America. The case also sheds light on the intertwined lives of citizens and noncitizens, and how immigrant rights groups such as the Midwest Committee for Protection of Foreign Born mobilized to defend people from exclusion and deportation under the McCarran-Walter Act of 1952. Federal censors’ decision to withhold materials on Lozoya more than fifty-five years later, and thirty years after his death, points to the enduring legacy of the Cold War and to the pervasive fear of radical politics in the twenty-first century.