Calderón Guardia, Rafael Ángel (räfäĕlˈ ängˈhĕl käldārōnˈ gwärˈdēä) [key], 1900–1970, president of Costa Rica (1940–44). A practicing physician, he entered politics in 1934, serving successively as vice president and president of congress (1935–39). He was leader of the Republican, or Calderista, party. As president, he brought Costa Rica into World War II on the Allied side and cooperated closely with the United States. He later served (1966–70) as ambassador to Mexico.
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