American samoa is known as an "Unorganized" and "Unincorporated" Territory of the United States
American Samoa is administered by the Office of Insular Affairs under the U.S. Department of the Interior. Its constitution was ratified in 1966 and was effective in 1967. Executive power is exercised by the government. Legislative power is vested in the two chambers of the legislature consisting of a Senate (18 members chosen by county councils) and a House of Representatives (20 members elected by popular vote, plus one nonvoting member from Swains Island, which is privately owned). The American political parties (Republican and Democrats) exist in American Samoa, but few politicians are aligned with the parties. The Judiciary is independent of the executive and the legislature.
American Samoa also sends one nonvoting delegate to the United States Congress.