The dual citizenship at birth is, or could be, the disqualifier for Obama to serve legitimately under the Constitution as President of the United States.
The founders, signers of the Declaration and drafters of the Constitution, were all born British subjects of the King. It was because of that that THEY were not ‘natural born citizens,’ and exempted themselves, reasonably enough, from that qualifier for president.
The dual citizenship was not foisted on him by another sovreign nation, it was conferred by the fact of his birth. It means, or could mean, a great deal.
The founders, signers of the Declaration and drafters of the Constitution, were all born British subjects of the King. It was because of that that THEY were not ‘natural born citizens,’ and exempted themselves, reasonably enough, from that qualifier for president.”
Actually, it's much simpler than that. You simply can't be a natural born citizen of a country that didn't exist when you were born. That's the obvious fact they were addressing. It doesn't represent a definitive determination about what they thought of people born in the US with a non-citizen parent.