Obama and Harris are probably not the last foreigners to reside in the White House. Camel was an anchor baby and Hussein an outright foreigner, both citizens of the British Empire at birth. With their acceptance and promotion the Presidency of the United States has begun opening the door to anyone on earth that is over 35 years old to run for the office. And if a young Chinese Lenin or Swedish Trotsky comes along and allies with the Democrats it might be sooner rather than later.
Seems to be the plan. Third time's a charm.