Congress had decided that once a slave traveled into a free state, they were free and they could never be enslaved again. But in the Dred Scott decision, they changed their mind and people no longer had to honor "once free, always free."
Hope this helps!
The Boston massacre came before the tea party. (Massacre 1770, and Tea party 1773)
The ambition of every mississippian in antebellum mississippi was to own a large plantation and have many slaves to help operate it
Well, the answer to this question is D. All of the amAbove
