What is the us code showing presidential citizenship requirements?

Answer 1

The us code that shows the requirements for the president is found inside the United States Constitution.
The President is not required to have 'citizenship' status per say, they are required to be a natural born citizen, or have already been a United States citizen when the constitution was adopted to be able to become President. Foreigners can not come to America, gain US citizenship, and then become President.

"No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any Person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States."
referenced ebook material from Project Gutenberg

Additionally, the 14th Amendment defines citizenship this way: "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." But even this does not get specific enough. As usual, the Constitution provides the framework for the law, but it is the law that fills in the gaps.

Currently, Title 8 of the U.S. Code fills in those gaps. Section 1401 defines the following as people who are "citizens of the United States at birth:"

• Anyone born inside the United States *
• Any Indian or Eskimo born in the United States, provided being a citizen of the U.S. does not impair the person's status as a citizen of the tribe
• Any one born outside the United States, both of whose parents are citizens of the U.S., as long as one parent has lived in the U.S.
• Any one born outside the United States, if one parent is a citizen and lived in the U.S. for at least one year and the other parent is a U.S. national
• Any one born in a U.S. possession, if one parent is a citizen and lived in the U.S. for at least one year
• Any one found in the U.S. under the age of five, whose parentage cannot be determined, as long as proof of non-citizenship is not provided by age 21
• Any one born outside the United States, if one parent is an alien and as long as the other parent is a citizen of the U.S. who lived in the U.S. for at least five years (with military and diplomatic service included in this time)
• A final, historical condition: a person born before 5/24/1934 of an alien father and a U.S. citizen mother who has lived in the U.S.

* There is an exception in the law - the person must be "subject to the jurisdiction" of the United States. This would exempt the child of a diplomat, for example, from this provision.

referenced Title 8 of the US Code and the US Constitution