His opinion, oddly, is as good as anybody else's. And, like everybody else's, it doesn't count in a court of law.
When this issue with obama first started I thought it was jsut about obama not wanting anyone to access his original birth certificate because of Article 2 , but that no longer seems valid. I’m sure that he could have a case concerning the meaning of Natural born tied up in court long after he’s gone. I now believe that the only thing that make sense is that he does not have a valid Hawaiian birth certificate( long form), which means he WAS NOT born in Hawaii. IF it could be proven that he was born overseas it would end his presidency at once. This is something that he would have no defense against in court.