The Monroe Doctrine was included in President James Monroe's 1823 annual message to Congress. The doctrine warns European nations that the United States will no longer tolerate any new colonization of Latin American countries. It was originally drafted to meet the present major concerns, but eventually became the precept of U.S. foreign policy in the Western Hemisphere. The doctrine was put into effect in 1865 when the U.S. government supported Mexican president, Benito Juárez, diplomatically and militarily. Some Latin American countries viewed the U.S. interventions, allowed by the Monroe Doctrine when the U.S. deems necessary, with suspicion.