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, 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.
