A Chinese anchor baby is a citizen by birth. And according to you a citizen by birth is a natural born citizen. Dido the children of GI's all over the world. Didi the children of trophy wifes in say Iran. All according to you natural born citizens eligible to serve a POTUS since they too have an American parent and thus are citizens by birth.
Not by statutory or codified law, but by practice and misapplication. The 14th Amendment, for instance, does not establish automatic citizenship on an "anchor baby," because that baby is not subject to the jurisdiction of the United States, but is subject to the jurisdiction of the country of which his parents are citizens. Politicians and jurists with agendas interpret laws to reflect their own biases. That's why the lefties torture the clear and unambiguous meaning of the 2nd Amendment's "...the right of the People to keep and bear arms, shall not be infringed," (an independent clause), and try to make it dependent on (the dependent clause) "A well regulated militia;" and why they misinterpret the 18th century "well regulated" to mean "well controlled," and not the "well-functioning" that was clearly intended.