...Obama now sets a precedent that anyone who hates this country, from Osama Bin Laden to Kim Jong Il, can have a child with an American woman and that child can be President.
...Obama’s defeat of the dual nationality issue, in both the courts and the media, means that the President’s parents do not have to be US citizens. If that is true, then the natural born citizen requirement in Article 2 Section 1 of the Constitution is basically rendered meaningless.
(page 246)
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.
(pg 250)
6. 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.
http://tesibria.typepad.com/whats_your_evidence/Lynch_v_Clarke_1844_ocr.pdf