Apparently Scalia is a moron too.
Jus Soli
1. (Law) the principle that a person’s nationality at birth is determined by the territory within which he was born.
Where in the Constitution is jus soli mentioned?
The Fourteenth Amendment says “All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside.” Therefore being born and being naturalized are two different things. You can be a naturalized citizen without being born jus soli.