By 1790, every state except georgia and had outlawed the international slave trade.

The Answer is South Carolina.
Georgia and south Carolina are the states.
During the time of revolutionary war, the trade of slaves stopped and all the states accepted that except the two above mentioned states, because in these both states the production of rice was totally depend on the slaves. Banning of slave trade was done for many reasons like for economic, politic and moral reasons.

Not sure if it’s within 12 months, but you could talk about the spreading of alt-right hate speech and whether that is covered by the right of freedom of speech? or, cover how during the midterm elections in some states many native american populations were declined to vote because they didn’t have the proper id, despite being citizens? also, the death of that journalist last month, who spoke freely and reported about the saudi government and how corrupted it is and was killed because of that (lack of free press/speech). just some ideas for this prompt, i hope at least one of them : )