Final answer:
Many White Americans viewed Manifest Destiny as the nation's right due to divine beliefs in territorial expansion and Americanization of indigenous populations.
Explanation:
White Americans saw Manifest Destiny as the nation's right due to a belief in the divine right to spread across the continent from the Atlantic to the Pacific. This concept was associated with the idea of Americanization of indigenous populations and the spread of democratic values. Despite James K. Polk's opposition, the overall sentiment of many White Americans favored the idea of Manifest Destiny as a justification for expansionist policies.
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