The decision effectively stated that states could not be 'free' or a 'slave state' because its unconstitutional for states to exclude slave ownership in territories. The decision also stated that slaves were not citizens, thus could not sue in federal court. The best answer is that slaves were not citizens.
16.John Brown
17.Abraham Lincoln
18.Emancipation Proclamation
They believed it was bad and went to any length the prevent it. (Not sure tho) Hope this helps
