For much of his second term, US President Donald Trump has sought to expand the influence of the US in the Western Hemisphere. His ambitions have stretched from eyeing off Greenland and the Panama Canal, to forcing a change of government in Venezuela. But even with the US military occupied in a war in the Middle East, he has begun to eye a new target, closer to home: Cuba.
USSC Associate Professor David Smith spoke with ABC News on the Monroe Doctrine and Republican reactions to then-Secretary of State John Kerry's declaration of its end.