Minor v. Happersett (Supreme Court) 1874
"The Constitution does not, in words, say who shall be natural-born citizens. Resort must be had elsewhere to ascertain that. At common-law, with the nomenclature of which the framers of the Constitution were familiar, it was never doubted that all children born in a country of parents who were its citizens became themselves, upon their birth, citizens also. These were natives, or natural-born citizens, as distinguished from aliens or foreigners. Some authorities go further and include as citizens children born within the jurisdiction without reference to the citizenship of their [88 U.S. 162, 168] parents. As to this class there have been doubts, but never as to the first. For the purposes of this case it is not necessary to solve these doubts."
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