Can you give a brief summary of the Hatfield case?
In a nutshell, Hatfield is asserting that Obama is not a Natural Born Citizen and cites Minor V. Happersett 1875. It is this case in which the Supreme Court of the United States defined Natural Born Citizen.
I believe the other lawyer is also going from the Natural Born Citizen definition as well. Orly Taitz is taking the Hawaii birth documents tack.