United States Ambassadors-at-Large

Richard Clarence "Dick" Clark (September 14, 1928 – September 20, 2023) was an American politician who represented the state of Iowa in the United States Senate as a Democrat from 1973 to 1979.

Lieutenant General George Marion Seignious U.S. Army (June 21, 1921 – July 3, 2005) was a distinguished military leader, diplomat and college president.