What constitutional protection to slavery did the Constitution provide?
Although the constitution never mentioned the world slave or slavery they used ambiguous language as a cover up to keep from saying the actual word.
Slavery was a hotly debated issue for the Founders.
It was originally mentioned in Article One of the Constitution, where the "Three Fifths" Compromise was put into place. Delegates from the North wanted to count only free men when it came to determining the number of representatives a state gets. Delegates from the South, though, (where slavery was much more common) wanted to count the slaves as well, as this would give them more power in Congress. In order to keep everyone happy, they decided (poorly, by today's standards) that slaves would count as 3/5s of a person when determining representation. This was repealed by the 13th amendment. The Thirteenth Amendment officially abolished slavery.
They debated hours over whether or not they would abolish slavery in the constitution if so to how much...