The Wilmot Proviso, an influential congressional measure from the 1840s that forbade the spread of slavery into the territories, served as the foundation upon which the Republican Party was later established.
Polk's appropriations bill did not include the Wilmot Proviso of 1846, yet it nonetheless left a significant effect. Slavery and involuntary servitude would be outlawed permanently in all areas obtained as a result of the Mexican-American War, according to the amendment's clear and simple goal.
Congressman David Wilmot proposed the Wilmot Proviso, which would have outlawed slavery in any new territory obtained from Mexico, during the conflict. Although the Senate rejected the proposal, the House of Representatives approved it.
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