Where he was born doesn't matter.

The constitution requires the president to be an American citizen but does not say how he has to prove he is an American citizen. There for the proof is left up to each voter. When the voter is convinced that a person is eligible to be president he may or may not vote for the that person. Every voter who is not convinced that the person running for office is an American citizen has the right to not vote for that person for that reason alone. When the majority of voters decide a person is eligible and they vote for him that is all the proof required that he is eligible to be president. If something happens later and the voters decide he wasn't eligible after all they can get him replaced in short order. If it's good enough for the majority of voters it's good enough for me. If there is a lot of doubt about a persons birth or citizenship it behooves the person running to prove where he was born if he thinks it will favor him in the election outcome. The truth of where he was born is not as important as what the majority of voters believe.