At the time of the drafting and ratification of the United States constitution,
the definition of natural born citizen, combined both the principles of jus soli and jus sanguinis.
“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.”
Emmerich De Vattel, (1714-1767,) Law of Nations, 1758, § 212, "Of the citizens and naturals."
However Chief Justice John Roberts swore in Barack Hussein Obama Jr. as the 44th President of the United States and the state of Hawaii has verified his birth documents.
“I, Dr. Chiyome Fukino, director of the Hawaii State Department of Health, have seen the original vital records maintained on file by the Hawaii State Department of Health verifying Barack Hussein Obama was born in Hawaii and is a natural-born American citizen. I have nothing further to add to this statement or my original statement issued in October 2008 over eight months ago.”
Furthermore in a lawsuit challenging Obama’s (and McCain’s) eligibility as Natural Born Citizens, the Indiana state Court of Appeals recently ruled that Vattel has no relevance to Article 2 Section 1, Clause 4 of the Constitution and that both McCain and Obama qualify as Natural Born Citizens for purposes of receiving valid electoral votes from the state of Indiana.
The lawsuit was Ankeny et. al. v Mitch Daniels, the Governor of Indiana. http://www.in.gov/judiciary/opinions/pdf/11120903.ebb.pdf