It would have been interesting to see what the reaction of the seven deep south states if the rest of the country had said, "We're leaving. We're taking whatever federal property we can get our hands of with us. You've got what property's left and the national debt. Good luck paying for it. Good bye." The southern states would have pooped a brick.
Property, debt? Isn't that the point? How much "Federal" property, how much "Federal" debt is too much. Where is the limit on the central government on those two things alone?