The Monroe Doctrine was expanded by the Roosevelt Corollary in 1904, providing that the United States had a right and obligation to intervene "in flagrant cases of such wrongdoing or impotence" that a nation in the Western Hemisphere became vulnerable to European control. In practice, this meant that the United States was led to act as a collections agent for European creditors by administering customs duties in the Dominican Republic (1905–1941), Haiti (1915–1934), and elsewhere. The intrusiveness and bad relations this engendered were somewhat checked by the Clark Memorandum and renounced by President Franklin D. Roosevelt's "Good Neighbor Policy."