David Wilmot

David Wilmot (January 20, 1814 – March 16, 1868) was an American politician and judge from Pennsylvania who served in the U.S. House of Representatives and U.S. Senate, and as a judge of the Court of Claims. He is best known for being the prime sponsor and eponym of the Wilmot Proviso, a failed legislative proposal to ban the expansion of slavery into western territories gained in the Mexican Cession. A northern Democrat when he introduced and supported the Proviso, he subsequently became a notable member of the anti-slavery Free Soil Party. Later, Wilmot was instrumental in establishing the Pennsylvania Republican Party.