United States v. Wong Kim Ark
In the case of United States v. Wong Kim Ark, 169 U.S. 649 (1898), the Supreme Court ruled that a person who
* is born in the United States
* of parents who, at the time of his birth, are subjects of a foreign power
* whose parents have a permanent domicile and residence in the United States
*
whose parents are there carrying on business and are not employed in any diplomatic or official capacity of the foreign power to which they are subject
becomes, at the time of his birth, a citizen of the United States, by virtue of the first clause of the 14th amendment of the Cons ution.