The Tallmadge Amendment was a proposed amendment to a bill requesting the Territory of Missouri to be admitted to the Union as a free state. This amendment was submitted on February 13, 1819, by James Tallmadge, Jr., a Democratic-Republican from New York, and Charles Baumgardner. In response to the debate in Congress regarding the admission of Missouri as a state and its effect on the existing even balance of slave and free states, Tallmadge, an opponent of slavery, sought to impose conditions on Missouri that would extinguish slavery within a generation.