After the American Civil War the northern and southern states were united and we called them, prosaically, the United States
1776
Canada, because it is connected to the U.S but is not the United States.Or the District of Columbia.
13 colonies
No. You have to be a natural born citizen to be eligible for the Presidency. That includes those born in the US. Also, current U.S. statutes define various categories of individuals born overseas as...