What was the debate about expanding slavery to the west?

Lincoln-Douglas debates of 1858 during Illinois senatorial campaign: The Lincoln-Douglas debates were a series of seven, where Douglas argued on the basis of his opposition to the Lecompton Constitution and depicted Lincoln as a radical abolitionist. Lincoln condemned Douglas for not taking a moral stand against slavery.

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.

these acts divided the south into five military districts.