Why did President Polk declare war on Mexico?

Polk's request to declare war on Mexico in a dispute over Texas. Under the threat of war, the United States had refrained from annexing Texas after the latter won independence from Mexico in 1836.

Explanation:

On May 13, 1846, the U.S. Congress overwhelmingly votes in favor of President James K. Polk's request to declare war on Mexico in a dispute over Texas. Under the threat of war, the United States had refrained from annexing Texas after the latter won independence from Mexico in 1836.

Explanation:

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