Assess the moral arguments and political actions of those opposed to the spread of slavery in the context of two of the following. missouri compromise, mexican war, compromise of 1850, kansas-nebraska-act.

In terms of the Mexican War, many of the opponents knew (and were right) that it was mainly just a war of conquest waged by President Polk for land, and that this land would most likely become slave territory, which many saw as a moral and inherent evil.