(Robert E.) Lee replied: “I yet believe that the maintenance of the rights and authority reserved to the states and to the people, not only essential to the adjustment and balance of the general system, but the safeguard to the continuance of a free government. I consider it as the chief source of stability to our political system, whereas the consolidation of the states into one vast republic, sure to be aggressive abroad and despotic at home, will be the certain precursor of that ruin which has overwhelmed all those that have preceded it.”
Mr. Liberty posted this in a comment at the OP site.
Now you could try to argue against either, but you’d be giving yourself away as an enemy.
BTW, I’m against slavery for any idiots who might be reading this. Why am I against it? Simple, if slavery exists then there is a chance, no matter how small, that me or mine could be made slaves (outright, and not just the taxable cattle kind).