In 1854 Kansas territory wanted become a state. The only question left to be decided was whether it would be a slave state or a free state. Stephen Arnold Douglas, the Democratic Senator of Illinois, strongly believed that the people of the territories should decide for themselves whether they wanted slavery. He sponsored the Kansas Nebraska bill and said that Kansas should be split into two states Kansas and Nebraska and that the question of slavery would be left to the vote of the settlers. He called this principle popular sovereignty. The debate over the question of slavery in the territories became more of a problem than expected. Proslavery and antislavery groups fought many wars, each side wanting to gain control of Kansas so they could have more power in Congress. More power would mean more votes for or against slavery. The bill also had its flaws. The law said that the people of Kansas were free to decide on slavery but the territories were not sovereign political units so they were not entirely free. This also caused controversy between the two sections. The wars were known as "Bloody Kansas." Neither side knew it, but with each day of fighting, they were getting a step closer to the Civil War.
In 1846 Dred Scott, a slave from Missouri, was involved in a case that would further the separation between the North and the South. After his master died, Scott tried to sue Missouri for his freedom claiming that since he lived in Illinois