State's rights--the idea that states wield the preponderance of political power within a union presided over by a federal government with limited powers--is inseparable with the use of humans as slaves? That's an interesting concept.
States’s rights would have permitted a State to ban slavery within its borders. That was what the Dred Scott decision forbade.
Previous decisions had removed the necessity of state officials to support slave catchers, making the kidnapping of accused former slaves a federal responsibility only. States had their personal liberty laws overturned, which extended even to accused escaped slaves the rights to trial and security in their persons until proven guilty.
The Civil War was not about States Rights. It was about the Slave Powers demand to run not only their only affairs, but also the affairs of their neighbors. They expected the Northern states to cave, as they had so many times previously.