Birthright citizenship according to the United States Constitution

(a) In general Section 301(a) of the Immigration and Nationality Act (8 U.S.C. 1401(a)) is amended to read as follows: (a) a person born in the United States and not subject to any foreign power: Provided, That a person born in the United States shall be deemed subject to a foreign power if neither parent of such person is a United States citizen or has been lawfully admitted for permanent residence at the time of such person's birth;. (b) Applicability The amendment made by subsection (a) may not be construed to affect the citizenship or nationality status of any person who was born before the date of the enactment of this Act.