David Wilmot (January 20, 1814 – March 16, 1868) was a U.S. political figure. He was a sponsor and eponym of the Wilmot Proviso which aimed to ban slavery in land gained from Mexico in the Mexican-American War of 1846–48. Wilmot was a Democrat, a Free Soiler, and a Republican during his political career. His opposition to slavery did not include the abolitionist position of ending slavery in the entire country, and his views on race, by today’s standards, can be classified as racist.
Wilmot practiced law for some time in Towanda, Pennsylvania and was involved in local politics as a strong supporter of Andrew Jackson. Wilmot was elected Representative from the 12th District of Pennsylvania as a Democrat in 1844. He served from 1845 until 1851, in the 29th, 30th and 31st Congresses. He initially supported the policies of President James Polk. Also, as a Representative of a largely agrarian district, he voted for the Walker Tariff of 1846 which made a moderate reduction in tariff rates. Only gradually did Wilmot come to believe that the South was dominating the national government to the detriment of the rest of the nation. .
Wilmot modeled the language for what would usually be referred to as the Wilmot Proviso after the Northwest Ordinance of 1787. The House, after first voting down a counter-proposal simply to extend the Missouri Compromise line across the Mexican Cession, passed the proviso by a vote of 83-64. This led to an attempt to table the entire appropriations bill rather than pass it with “the obnoxious proviso attached”, but this effort was defeated “in an ominously sectional vote, 78-94". The Senate adjourned rather than approve the bill with the proviso.
A similar measure was brought forward at the next session with the appropriation amount increased to $3 million, and the scope of the amendment expanded to include all future territory which might be acquired by the United States. This was passed in the House by a vote of 115 to 105, but the Senate refused to concur and passed a bill of its own without the amendment. The House acquiesced, owing largely to the influence of General Lewis Cass. As the 1848 presidential election took shape, the Democrats rejected the Wilmot Proviso in their platform and selected Cass as their candidate to run on a popular sovereignty platform. The new Free Soil Party rallied around the Wilmot Proviso, and nominated Martin Van Buren on a platform calling for “No more slave states and no more slave territory.”
By 1848 Wilmot was thoroughly identified as a Free Soiler, but, like many other Free Soilers, Wilmot did not oppose the expansion of slavery based on a moral rejection of the institution itself. In a speech in the House, Wilmot said, “I plead the cause and the rights of white freemen [and] I would preserve to free white labor a fair country, a rich inheritance, where the sons of toil, of my own race and own color, can live without the disgrace which association with negro slavery brings upon free labor.” Around the same time, however, Wilmot, in a New York speech, spoke of the ultimate demise of slavery when he argued, “Keep it within given limits …and in time it will wear itself out. Its existence can only be perpetuated by constant expansion. … Slavery has within itself the seeds of its own destruction.”
Wilmot was presented as the Free Soil candidate for Speaker of the House in 1849 and was soon at odds with the mainstream Pennsylvania Democratic Party led by James Buchanan. Wilmot was forced to withdraw from the 1850 Congressional elections in favor of the more moderate Galusha A. Grow. Wilmot was elected as a presiding judge of the 13th Judicial District of Pennsylvania in 1851, serving till 1861, and he was instrumental in founding the Republican Party in Pennsylvania. He chaired the Republican Party platform committee, was a delegate to the 1856 national convention, and worked vigorously for the first Republican presidential candidate, John C. Fremont, in 1856.
He was also a member of the peace convention of 1861, held in Washington, D.C., in an effort to devise means to prevent the impending American Civil War. Wilmot was appointed by President Abraham Lincoln as judge of the Court of Claims in 1863 and served until his death in Towanda in 1868. He is interred in Riverside Cemetery.