 Kansas initially approved a pro-slavery constitution called the Lecompton Constitution, but after the U.S. Congress rejected it, the state approved the anti-slavery Wyandotte Constitution and was admitted to the Union in January 1861.The violence along the Kansas–Missouri border foreshadowed the national violence to come, and indeed continued throughout the Civil War.Against the background of Bleeding Kansas, the case of Dred Scott, a slave who in 1846 had sued for his family's freedom in St. Louis, reached the U.S. Supreme Court.