Sir;... Mr. Obama et al are absolutely correct in the given answer, that there is only one president at a time... In fact, it should be the answers to all hypothetical questions asked of presidential candidates....They should say: This is who I am; and this is what I know, and that is why you should vote for me... But no one should ever say what they will do... What an English jurist once said is true in all instances: There are no imaginary cases... When a person can do they should be held to account on what they do, do... You know how often people are allowed to slide on that one because we are so dominated by ideology, and either people feed that beast or fear to wake it... Thanks...Sweeney