Tell me stupid. Where in The Constitution is the clause allowing slavery? I have to tell everything to you "stupid", because telling you "smart" goes over your head.
Article IV, section 2. It not only allows it, it compels all lawful authority to aid in the return of slaves to their masters.
Liberal northern states just ignored that part of the US Constitution because they didn't like it.
The article does NOT use the word ‘’slave’’ it refers to fugitives fleeing prosecution for crimes in one state to another. read an explanation of the whole thing you idiot and you'll see it means the exact opposite of what you Confederates think it means.