A State's right to all Powers not enumerated in the Constitution (10A). That and the Confederate States tried to pull a 1776, since they didn't have a single r

A State's right to all Powers not enumerated in the Constitution (10A). That and the Confederate States tried to pull a 1776, since they didn't have a single representative who polled for Lincoln in the EC, the Union states had effective super majorities in Congress, ergo time to form their own system of government, representative of themselves. They just weren't expecting Sherman.