Final answer:
The Monroe Doctrine was a U.S. foreign policy statement that asserted U.S. dominance in the Western Hemisphere. The American seizure of Hawaii can be seen as an expansion of this doctrine because it demonstrated the U.S.'s willingness to intervene in the region and protect its own interests.
Step-by-step explanation:
The Monroe Doctrine was a U.S. foreign policy statement issued in 1823 that asserted U.S. dominance in the Western Hemisphere and warned European nations against interfering in the affairs of independent countries in the Americas. The American seizure of Hawaii can be seen as an expansion of this doctrine because it demonstrated the U.S.'s willingness to intervene in the region and protect its own interests. By annexing Hawaii in 1898, the U.S. effectively extended its influence in the Pacific and asserted its power in the Western Hemisphere as a whole.