After completion of the Munich Agreement and the execution of Kristallnacht, American public opinion turned against Germany, and Roosevelt began preparing for a possible war with Germany. Relying on an interventionist political coalition of Southern Democrats and business-oriented Republicans, Roosevelt oversaw the expansion U.S. airpower and war production capacity. In the 1932 presidential election, Roosevelt defeated Republican President Herbert Hoover in a landslide. Roosevelt took office in the midst of the Great Depression, the worst economic crisis in U.S. history. Although his nomination surprised most people, Roosevelt balanced the ticket as a moderate, a Wilsonian, and a prohibitionist with a famous name. Roosevelt had just turned 38, four years younger than Theodore had been when he received the same nomination from his party.