Respuesta :
The American- Mexican war was supported by Believers in Manifest destiny, Members of Democratic Party, and Supporters of slavery.
Manifest Destiny: The concept of Manifest Destiny held that the United States had the providential right to expand to the Pacific Ocean, and was used to validate continental acquisitions in the Oregon Country, Texas, New Mexico, and California.
Supporters of slavery: Many Scholars argue that the war as an attempt by the slave states to extend slavery and enhance their power with the creation of additional slave states out of the soon-to-be-acquired Mexican lands.
Members of Democratic Party: Democrats, those in the Southwest, strongly favoured the Mexican-American War because most of them supported slavery and protected it.
Abolitionist and Members of Whig Party were strongly against the war.
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