USA HISTORY

Detailed explanation-1: -Congressman David Wilmot of Pennsylvania first introduced the proviso in the House of Representatives on August 8, 1846, as a rider on a $2, 000, 000 appropriations bill intended for the final negotiations to resolve the Mexican–American War (this was only three months into the two-year war).

Detailed explanation-2: -In 1846, a Pennsylvania representative named David Wilmot proposed legislation intended to bar slavery’s expansion into the lands acquired after the Mexican-American War. The Wilmot Proviso failed to pass-and debate over the proposal exacerbated North-South tensions.

Detailed explanation-3: -A U.S. Congressman (1845-1851) and later Senator (1861-1863) from Pennsylvania, David Wilmot sponsored an amendment to an appropriations bill in the House of Representatives on August 8, 1846, which proposed the banning of slavery in land gained from Mexico in the Mexican-American War.

Detailed explanation-4: -During an attempt to pass the bill in 1848, Senator Thomas Corwin, a Whig from Ohio, stood up before the Senate and gave his arguments against the piece of legislation.