What is the Monroe Doctrine? The name refers to U.S. President James Monroe (1817-1825), who adopted a policy opposing European colonialism in the Western Hemisphere. In his annual message to Congress on December 2, 1823, where he spoke about key principles, the most famous of which was that «any attempt by a European power to establish control over any American country will be considered as an act of hostility against the United States». With the announcement by U.S. President Donald Trump of the successful arrest of Venezuelan President Nicolas Maduro and his delivery to New York, he said that «the United States will not forget the Monroe Doctrine anymore,» referring to the fifth U.S. president, James Monroe, who advocated for American dominance in the Western Hemisphere.
