The problem is US law doesn’t specifically state what “Natural Born” is, that term is vague. Donofrio is not correct because British Common Law doesn’t define US Citizenship standards, per the Constitution Article 1 Section 8- only Congress can define what are our Citizenship standards. Title 8 of the US code does define what citizenship is and doesn’t use the British Common Law or any other foreign law in its definition. In Obama’s case, if he was born in Hawaii and his mother was a citizen, then he is a citizen, no preconditions. The challenge comes in if he was born in Kenya because even if his mother was born in the US and a citizen, she may not have met the residency requirements of Title 8 to pass along citizenship (if her and Obama’s father where legally married, another bag of worms there.)
His Mom was too young to confer citizenship.
Hmmm, but if Barry had been adopted by the elder Dunhams, then he’d be in the clear - I think.
This is true but incomplete. Anyone born in the US is a citizen except children of diplomats, hostile occupying armies, aliens in transit through US airspace or waters on their way between two non US destinations and prior to 1924, Indians subject to tribal Law. Everybody else is 'subject to the jurisdiction' of the United States, per the 14th Amendment and substantial SCOTUS rulings. The reason the mother citizenship qualification makes it true is that it precludes any of the listen exceptions.