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The United States of America (USA or U.S.A.), commonly known as the United States (US or U.S.) or America, is a country primarily located in North America. It is a federal union of 50 states, the federal capital district of Washington, D.C., and 326 Indian reservations. [j] The 48 contiguous states border Canada to the north and Mexico to the ...
The United States of America is a federal republic [1] consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States), five major territories, and various minor islands. [2][3] Both the states and the United States as a whole are each sovereign jurisdictions. [4] The Tenth Amendment to the United States ...
The history of the lands that became the United States began with the arrival of the first people in the Americas around 15,000 BC. Numerous indigenous cultures formed. After European colonization of North America began in the late 15th century, wars and epidemics decimated indigenous societies. Starting in 1585, the British Empire colonized ...
Since the office was established in 1789, 45 men have served in 46 presidencies. The first president, George Washington, won a unanimous vote of the Electoral College. [4] Grover Cleveland served two non-consecutive terms and is therefore counted as the 22nd and 24th president of the United States, giving rise to the discrepancy between the ...
The Constitution of the United States is the supreme law of the United States. [ 3 ] It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution delineates the frame of the federal government.
Flowchart of the U.S. federal political system. The United States is a constitutional federal republic, in which the president (the head of state and head of government), Congress, and judiciary share powers reserved to the national government, and the federal government shares sovereignty with the state governments.
Under the law, the Immigration and Nationality Act of 1965, [121] the number of first-generation immigrants living in the United States has increased, [122] from 9.6 million in 1970 to about 38 million in 2007. [123] Around a million people legally immigrated to the United States per year in the 1990s, up from 250,000 per year in the 1950s. [124]
The United States of America is a federal republic of 50 states, a federal district and 14 territories.It is located mostly in central North America.The U.S. has three land borders, two with Canada and one with Mexico, and has sea borders with Cuba, the Bahamas, the Dominican Republic, Bermuda and Russia, and is otherwise bounded by the Pacific Ocean, the Bering Sea, the Arctic Ocean and the ...