Lynch v. Clarke, 3 N.Y.Leg.Obs. 236, 1 Sand. Ch. 583 (1844)"Upon principle, therefore, I can entertain no doubt, but that by the law of the United States, every person born within the dominions and allegiance of the United States, whatever were the situation of his parents, is a natural born citizen."
"The entire silence of the constitution in regard to it, furnishes a strong confirmation, not only that the existing law of the states was entirely uniform, but that there was no intention to abrogate or change it. The term citizen, was used in the constitution as a word, the meaning of which was already established and well understood. And the constitution itself contains a direct recognition of the subsisting common law principle, in the section which defines the qualification of the 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," &c. The only standard which then existed, of a natural born citizen, was the rule of the common law, and no different standard has been adopted since. 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 that by the rule of the common law, in force when the ' the colonies and in the states, under the constitution was adopted, he is a citizen."
And, as to your earlier cite of Perkins v. Elg, Miss Marie Elg was born of two citizen parents under the law at that time, she was born in the United States, and therefore she was a natural born citizen. So, citing Elg is in no way helpful to you or to Obama.