To decide if the conquered territories would become free or slave states. This ultimately led to the American Civil War (1861-1865)
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the united states wanted texas to join the union.
States rights, slavery, western expansion, trade, property and taxation, cause many of the debates.
Mexican American War
Mexican War
The Mexican-American War exacerbated political problems in the US by reigniting debates over the expansion of slavery. The acquisition of Mexican territories, such as California and New Mexico, raised questions about whether slavery should be allowed in these new territories. This disagreement between Northern and Southern states further polarized the nation and ultimately contributed to the growing tensions that led to the American Civil War.