Noninterventionism or internationalism?
From the League of Nations fight to NATO, Republicans argued over how far the United States should commit itself abroad.
Noninterventionists
Senators such as William E. Borah, Hiram Johnson, Gerald Nye and Robert A. Taft argued that the Constitution gave the war power to Congress, that Europe’s quarrels were not America’s, and that hemispheric defense and neutrality would keep the nation free. In 1940 and 1941 the nonpartisan America First Committee opposed Lend-Lease and intervention; its cause was badly damaged when its most famous speaker, Charles Lindbergh, blamed Jewish Americans, among others, for pushing the country toward war—remarks widely condemned as antisemitic.
Internationalists
Republicans such as Henry L. Stimson and Frank Knox, who joined Roosevelt’s cabinet in 1940, and the party’s 1940 nominee, Wendell Willkie, supported aid to Britain. After Pearl Harbor, and especially after Vandenberg’s 1945 speech, most Republicans embraced collective security through the United Nations, the Marshall Plan and NATO.
Historians
Historians note that “isolationist” was often used as a term of criticism: many noninterventionists favored trade and diplomacy abroad and opposed only alliances and war. The tension between the two traditions has recurred in Republican politics ever since.
Sources
- American Isolationism in the 1930s · Office of the Historian, U.S. Department of State
- America First Committee (1940–1941) · United States Holocaust Memorial Museum


