Natural-born citizen is an individual of either sex who owes allegiance or fealty to a government of the country in which he or she was born, and whose parents were citizens of the same country at the time of that individual's birth.
Meaning of the term
Natural-born citizen as a term of usage in the United States, evidently comes from the writings of Emmerich de Vatell (1714-1767),[Who says?] a Swiss philosopher and legal scholar who laid the foundations and concepts of modern law.
"The citizens are the members of the civil society; bound to this society by certain duties, and subject to its authority, they equally participate in its advantages. The natives, or natural-born citizens, are those born in the country, of parents who are citizens. As the society cannot exist and perpetuate itself otherwise than by the children of the citizens, those children naturally follow the condition of their fathers, and succeed to all their rights. The society is supposed to desire this, in consequence of what it owes to its own preservation; and it is presumed, as matter of course, that each citizen, on entering into society, reserves to his children the right of becoming members of it. The country of the fathers is therefore that of the children; and these become true citizens merely by their tacit consent. We shall soon see whether, on their coming to the years of discretion, they may renounce their right, and what they owe to the society in which they were born. I say, that, in order to be of the country, it is necessary that a person be born of a father who is a citizen; for, if he is born there of a foreigner, it will be only the place of his birth, and not his country."
Thomas Jefferson gave a further definition prior to the drafting of the United States Constitution: "A Natural subject is one born within the king's allegiance & still owing allegiance. No instance can be produced in the English law, nor can it admit the idea of a person's being a natural subject and yet not owing allegiance. An alien is the subject or citizen of a foreign power." John Jay, in a letter to George Washington while he served as president of the Constitutional Convention, went further with a pointed question: "Permit me to hint whether it would not be wise and seasonable to provide a strong check to the admission of foreigners into the administration of our national government; and to declare expressly that the command in chief of the American army shall not be given to, nor devolve on any but a natural born citizen." The implication is that the President of the United States should have loyalty to no country other than his own, which is naturally-guaranteed by birth to two citizen parents.
Jay apparently had some influence on Washington, for when the Convention ended and the new Constitution was ratified, only the qualifications for the office of president in Article II had the term "natural-born"; the qualifications for Senator and Representative in Article I did not: "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...."
Because the Constitution fails to define the term "natural born Citizen", establishment of its precise meaning would fall to Congress or the courts. The only US law that has ever employed the exact term "natural born citizen" is the Naturalization Act of 1790:
And the children of citizens of the United States, that may be born beyond sea, or out of the limits of the United States, shall be considered natural born citizens: Provided, That the right of citizenship shall not descend to persons whose fathers have never been resident in the United States: Provided also, That no person heretofore proscribed by any state, shall be admitted a citizen as aforesaid, except by an act of the legislature of the state in which such person was proscribed.
This law was passed by the First Congress, which counted among its members nearly half of the signers of the Constitution (and was signed into law by a president who was also a signer of the Constitution), so it may give some insight into the intention behind this provision. However, the 1790 act was repealed in 1795.
The case of United States vs Wong Kim Ark (1898) is the most notable precedent which attempts to define the term, with the New York Chancery Court stating,
- "Suppose a person should be elected president who was native born, but of alien parents; could there be any reasonable doubt that he was eligible under the Constitution? I think not. The position would be decisive in his favor" 
In this case, Wong Kim Ark was found to be entitled to citizenship in perpetuity through the 14th Amendment, by virtue of being born within the United States, despite both parents being non-citizens, and having been raised out of the country. The decision was affirmed by the US Supreme Court. The case was referenced as recently as 2009, in which the Indiana Court of Appeals declared,
- "based upon the language of Article II, Section 1, Clause 4 and the guidance provided by Wong Kim Ark, we conclude that persons born within the borders of the United States are 'natural born Citizens' for Article II, Section 1 purposes, regardless of the citizenship of their parents"
Thus is seems incontrovertible that someone born within the United States, and who thereby gains citizenship, is a natural born citizen.
It is clear that someone who was not a citizen from birth, but acquired citizenship through naturalization, is not natural born. One view is that all others, meaning anyone who is a citizen from the moment of birth, are natural-born citizens. There are arguments that a third category exists, of those who are citizens from birth by law or status, but are not intended to be considered as natural born. The most common reasons given are that the birth did not take place within the US, or that one of the birth parents was not a US citizen. Precedents indicate that neither of these conditions will prevent someone from attaining the Presidency.
Presidential candidate John McCain was born to U.S. military parents stationed in the Panama Canal Zone, a territory within Panama which until 1978 was administered by the United States. The Senate passed a nonbinding resolution declaring that he was indeed a natural born citizen.
Two presidents were born having a father who was not a citizen.
- Chester Arthur was born in the US (though rumored to have been born in Canada), but his father was at that time a citizen of the UK.
- Barack Obama, who was born in Hawaii on August 4, 1961. His father was a British national from Kenya who was at that time attended a university on a student visa.
Two potential candidates in the Presidential Election 2012 were born having a father who was not a citizen.
- Marco Rubio was born in the US, but his parents were Cuban exiles who were not US citizens at the time.
- Bobby Jindal was born in the US, but his parents were Indian nationals at the time of his birth.
"Scrubbing" of the term from the internet
In the wake of the official release of President Obama's long-form birth certificate, editors have engaged in an edit war in Wikipedia in their article on the subject, as key references to Vatell about the meaning of natural-born citizen were forcibly removed. Within a week, "sanitizing" of sorts took place on other online dictionaries and reference sites, as each revision sought to push the idea that the Constitution's natural-born clause should refer to anyone born in the United States regardless of the immigration status of the parents.
- Vatell: CHAP. XIX. OF OUR NATIVE COUNTRY, AND SEVERAL THINGS THAT RELATE TO IT.
- Notes by Jefferson, December, 1783, pertaining to letters written by Delegates to Congress
- U.S. v. Wong Kim Ark (1898) 169 U.S. 649, 42 L.Ed. 890, 18 S.Ct. 456.
- Ankeny v. Governor, 929 N.E.2d 789 (Ind. 2010)
- S.Res.511: A resolution recognizing that John Sidney McCain, III, is a natural born citizen; sponsors: Sen. Claire McCaskill, Sen. Barack Obama et al.
- http://www.onelook.com/?w=Natural%20born%20citizen&ls=a (mirrors Wikipedia)
- http://encyclopedia.thefreedictionary.com/natural%20born%20citizen (mirrors Wikipedia)
- de Vatell, Emmerich. The Law of Nations; T. & J.W. Johnson & Company, Philadelphia (1883)
- Personal blog which goes into detail on an 1896 case