In 1956 he moved to New York City, which was the focal point of Acción Democrática's leadership in exile, with Betancourt as the principal leader. In the aforementioned metropolis Lusinchi obtained a master's degree in pediatrics, at Lincoln Hospital and the Bellevue Hospital Center, joining the American Academy of Pediatrics. On 23 January 1958, democracy was restored in Venezuela. Therein after the fall of the Pérez Jiménez Government, Lusinchi returned from exile, and joined the National Executive Committee of Acción Democrática as secretary for International Affairs. In the 1959 General Elections he was elected deputy for Anzoátegui for the National Congress, being re-elected in 1963, 1968 and 1973.