♣ So what is the difference between state sovereignty and local home rule? Under the Tenth Amendment and with limits, the states have the authority to manage their own affairs. Local government is a creation of the state, so it is under the authority of the state. The powers of local government are wholly defined by the state. The principle is that the state is sovereign in either case - both in authority over local government and against federal encroachment over authority that rightfully belongs to the state.