Answer: The Communist Leader that the US tried to overthrow was Fidel Castro.
Explanation: Fidel Castro had been a concern to U.S. policymakers since he seized power in Cuba with a revolution in January 1959. Castro’s attacks on U.S. companies and interests in Cuba, his inflammatory anti-American rhetoric, and Cuba’s movement toward a closer relationship with the Soviet Union led U.S. officials to conclude that the Cuban leader was a threat to U.S. interests in the Western Hemisphere.