"Born in the United States"? Has that ever been considered a requirement provided both parents were US citizens? What if they were vacationing in Canada when the child was born, or serving as diplomats?
I think the only President before Soetoro whose eligibility was seriously questioned was Chester Alan Arthur--reportedly born in Vermont but some claimed he had been born a few miles to the north in Quebec, and his father was not a US citizen at the time of his birth. But it was generally accepted that he had been born in Vermont (before it became a People's Republic).
Since the 70’s I firmly believed my brother could not be president cause he was born in another country.
Read my #73 below. The SR 511 committee lays it all out. NBC = born in US of two US citizen parents.