Most immigrants that travel through angel island were from China japan etc (Asian countries )
Answer:
The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. Buried in a routine annual message delivered to Congress by President James Monroe in December 1823, the doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs.
Because Congress also had Southern delegates that would stop any abolition movements when Northern delegates proposed it.
