the south was already signed onto the law for ending slavery, and were part of the same union. you havent made a good enough hypothetical yet. there's no lack

the south was already signed onto the law for ending slavery, and were part of the same union. you havent made a good enough hypothetical yet. there's no lack of slave states around, including ones that the US does business with happily. i think yes, if you made your hypothetical "what if the US had a slaver neighbor" yes, the US would be leaving them alone, other than some economic pressures here and there