Donofrio argues that the "birth certificate" and "Indonesia" issues are irrelevant to Obama's eligibility to serve as President.
The framers recognized that EVEN THEY were not "natural born citizens." That's why they included a grandfather clause to allow any of them to become President.
Donofrio argues that the word "born" constitutes proof positive that the framers intended that status as a "citizen" must be present at birth, since if this was not the intent there would have been no need for the grandfather clause. Dual citizenship at time of birth (British/US) was allowed for the framers themselves under the grandfather clause, but for no one else.
Hence, argues Donofrio, Obama is not a natural born citizen, and even if he produces an original birth certificate proving he was born in Hawaii it will not change the fact that he was a British citizen at birth.
These are matters of core Constitutional eligibility,