Robert E. Hannegan
 Robert Emmet Hannegan (June 30 1903 – October 6 1949) was a St. Louis Missouri politician who served as Commissioner of Internal Revenue from October 1943 to January 1944. He also served as chairman of the Democratic National Committee from 1944 to 1947 and United States Postmaster General from 1945 to 1947. After his political career in 1947 Hannegan and partner Fred Saigh purchased the St. Louis Cardinals of Major League Baseball.