The left brought up John McCain's eligibility to be President, because he was born outside the US, in the Panama Canal Zone. He produced his BC, and it was shown that, because his father was in the military at the time, and both his parents were citizens of the US, there was no question but that he was a 'Natural Born Citizen'.
It just looks suspicious, because That One is doing such gyrations trying to skirt the issue. It would be a lot less hassle to just show us the document, IF he is, in fact, eligible for the Office.