How is power divided in the United States government? - Belinda Stutzman
Federal, state and local authorities searching for rioters
Unitary States Vrs Federal States[AP Human Geography Unit 4 Topic 7] (4.7)
A federation is a political entity characterized by a union of partially self-governing provinces, states, or other regions under a central federal government. In a federation, the self-governing status of the component states, as well as the division of power between them and the central government, is typically constitutionally entrenched and may not be altered by a unilateral decision of either party, the states or the federal political body. Alternatively, federation is a form of government in which sovereign power is formally divided between a central authority and a number of constituent regions so that each region retains some degree of control over its internal affairs. It is often argued that federal states where the central government has the constitutional authority to suspend a constituent state's government by invoking gross mismanagement or civil unrest, or to adopt national legislation that overrides or infringe on the constituent states' powers by invoking the central government's constitutional authority to ensure "peace and good government" or to implement obligations contracted under an international treaty, are not truly federal states.