The number of those who remember hearing the voice of Father Charles E. Coughlin on the radio on Sunday afternoons in the 1930s and 1940s is dwindling. Those who do recall generally respond with adulation or disdain. Coughlin, like his contemporary Franklin D. Roosevelt, was either loved and admired or held in a kind of contempt. In the past, writers reflected on Coughlin chiefly from a political or socio-cultural point of view. My goal in researching “the radio priest,” however, has been to explore the theological roots of the anti-Semitism (more properly anti-Judaism), which became a dominant note in his speeches and writings, particularly in the year 1938 and thereafter.