Question: what type of nation is the united states
Answer: 6 % Unknown Demonym American Government Federal presidential constitutional republic President Donald Trump Vice President Mike Pence House Speaker Paul Ryan Chief Justice John Roberts Legislature Congress Upper house Senate Lower house House of Representatives Independence from Great Britain Declaration July 4 , 1776 Confederation March 1 , 1781 Treaty of Paris September 3 , 1783 Constitution June 21 , 1788 Last polity admitted March 24 , 1976 Area Total area 3,796,742 sq mi ( 9,833,520 km ) ( 3rd / 4th ) Water ( % ) 6.