In addition, The EC was actually anti-slavery. This is why Southern States were only credited with 3/5 of a black person to calculate their representation. The North made this compromise to avoid the Southern States from having too much power, while enticing them to be in The Union. It was always on the mind of The Founders that slavery would need to go away, but this was how they kept he Southern States from being too strong and not eventually abandoning slavery. As you can see, a war had to happen later.
The point oabout EC being anti slavery is absurd.