Example image of eyePlorer eyePlorer map for 'Politics of the United States': Federal government of the United States Federal republic Head of government Head of state President of the United States Presidential system Separation of powers Sovereignty U.S. state United States United States Congress United States federal courts Two-party system Executive (government) United States House of Representatives United States Senate Judiciary Supreme Court of the United States Law of the United States United States Constitution American Civil War Democratic Party (United States) List of political parties in the United States Republican Party (United States) State governments of the United States Contract Crime Education Family law Governor (United States) Deliberative assembly House of Delegates House of Representatives Nebraska Senate Unicameralism Local government Council-manager government Mayor-council government County (United States) Township (United States) Arlington County, Virginia Potomac River Washington, D.C. Consolidated city-county County seat Sole commissioner New England Civil township Town meeting