“Every person born in the United States, and subject to the jurisdiction thereof, becomes at once a citizen of the United States, and needs no naturalization
. A person born out of the jurisdiction of the United States can only become a citizen by being naturalized, either by treaty, as in the case of annexation of foreign territory, or
by authority of Congress, exercised either by declaring certain classes of persons to be citizens, as in the enactments conferring citizenship upon foreign-born children of citizens, or by enabling foreigners individually to become citizens by proceedings in the judicial tribunals, as in the ordinary provisions of the naturalization acts.” (Again, the italics above were added by the CRS in the 2016 report.)
Latest CRS report discusses presidential birthplace issue