For the record SIX Supreme Court Justices ruled Wong Kim Ark to be a Citizen of the United States At Birth, two Justices disagreed and one Justice, who had just been appointed and had missed oral arguments recused himself.
But a citizen of the United States AT birth is not the same as a citizen of the United States BY birth.
Between alien friends, who are temporary subjects, and subjects naturalized or natural born, a species of subjects intermediate is known to the law of England. They are distinguished by the appellation of denizens. The power of denization is a high and incommunicable portion of the prerogative royal. A denizen is received into the nation, like a person who is dropt from the clouds. He may acquire rights, but he cannot inherit them, not even from his own parent: he may transmit rights to his children, who are born after his letters patent of denization; but not to those who were born before.
James Wilson , Collected Works, vol. 2, Lectures on Law
Why could one not inherent before formally being recognized as a denizen? Because natural born citizenship is a political Allegiance inherited by blood.
If it's bestowed by man, to ANY extent, it's naturalization
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Besides...do you REALLY think any part of the administrative organ would admit it granted itself the ability to create citizens at will and despite a person's Natural allegiance?
Five Republican Judges and one Louisiana Democrat. The two dissenting Judges were Democrats.
Pardon me if I see a little politics operating here. I suspect it played a part in this decision.