The Monroe Doctrine, issued in 1823 by President James Monroe, dictates that the Western Hemisphere is closed to further colonization and interference by European powers. Adherence to this doctrine has been a cornerstone of US foreign policy in the Americas for almost 200 years. Synonyms for adherence to the Monroe Doctrine include upholding, following, and compliance with it. Other phrases to describe this commitment include fidelity, loyalty, and devotion to this foreign policy principle. Regardless of the wording, the United States remains committed to upholding the Monroe Doctrine, and any failure to do so could potentially lead to negative consequences for the country and its relationship with its neighbors to the south.