that prohibited slavery in states from the former Louisiana Purchase the latitude 36 degrees 30 minutes north except in Missouri. During the Mexican War, conflict started about what would happen with the new territories that the US expected to gain upon victory. David Wilmot proposed the Wilmot Proviso in 1846 which would ban slavery in the new lands. However, this was shot down to much debate. The Compromise of 1850 was created by Henry Clay and others to deal with the balance between slave and free states, northern and southern interests. One of the provisions was the fugitive slave act that was discussed in number one above. Another issue that further increased tensions was the Kansas-Nebraska Act of 1854. It created two new territories that would allow the states to use popular sovereignty to determine whether they would be free or slave. The real issue occurred in Kansas where proslavery Missourians began to pour into the state to help force it to be slave. They were called "Border Ruffians." Problems came to a head in violence at Lawrence Kansas. The fighting that occurred caused it to be called " Bleeding Kansas ." The fight even erupted on the floor of the senate when antislavery proponent Charles Sumner was beat over the head by South Carolina's Senator Preston Brooks. 4. Growth of the Abolition Movement. Increasingly, the northerners became more polarized against slavery. Sympathies began to grow for abolitionists and against slavery and slaveholders. This occurred especially after some major events