There seem to be mixed messages on this. My understanding is that a natural born citizen of the United States must have both a father and a mother who are naturalized citizens, thus making Obama ineligible. But . . . I am not so sure my understanding is in accord with legal reality.
Red Badger and I had a brief back and forth on this some weeks ago. Maybe he could elaborate or comment.
Herbert Hoover’s mother was born in Canada, although she may have been naturalized by the time of his birth. The previous poster is correct, however, that anyone born on American soil is an American, regardless of parentage. Even a child born outside the United States with an American parent is an American, as was the case with George Romney and John McCain.