Answer:
the cause was that Mexican- american war was a conflict between the united states and Mexico fought from April 1846 to February 1848. the main cause of the war was the westard expansion of the united states.
Explanation:
Missouri’s admission to American statehood in 1819 was controversial
because it raised question on whether slavery should be expanded westwards. Henry
Clay proposed that slaveholders be prohibited from bringing new slaves to
Missouri. The dispute was resolved through the Missouri Compromise that paired
the admission of slave and free states
He Was in Disagreement with the new Articles of Confederation