The basic political unit in the United States is the state. States - one of the 50 components of the
administrative and political units whose sovereignty is shared with the federal
government of the United States. The
state has a unique function in the American system of government because of the
way the nation developed. Initially, at the announcement of independence of the
United States, in the new state entered 13 colonies later the first 13 US
states. Further, as a result of wars, buying and voluntary association are
attached other states.