How Did The Constitution Support Slavery

At the time of the Civil War, I personally believe the Constitution supported slavery more than it did to oppose it. The opposition of slavery existed, in some forms, among supporters of the Constitution. It seems few though were willing to risk the union for it. The slave states were aware of this and used it as a power in the Convention. In a way, it seemed it was a threat to break up the union. The slave states made it clear that their support for the Constitution was dependent on the absence of any apparent threats it brought to slavery. The slaves were considered property and the constitution protected that. By allowing southern states to count each slave as 3/5’s a person, but also not giving slaves the right to vote, guaranteed that