See the Lincoln-Douglas debate #6. Stephen Douglas: We then adopted a free State Constitution, as we had a right to do. In this State we have declared that a negro shall not be a citizen, and we have also declared that he shall not be a slave. We had a right to adopt that policy. Missouri has just as good a right to adopt the other policy. I am now speaking of rights under the Constitution, and not of moral or religious rights. I do not discuss the morals of the people of Missouri, but let them settle that matter...