Franklin D. Roosevelt's Address to the Congress Asking That a State of War Be Declared Between the United States and Japan, www.loc.gov. December 8, 1941.
First Inaugural Address, 4 Mar. 1933. According to Hans Sperber and Travis Trittschuh, American Political Terms: An Historical Dictionary, Herbert Hoover prominently used the term "good neighbor" during his tour of South America after the 1928 presidential election.