Among the many functions of the President is to represent the US in international affairs. Among many other things he must negotiate with leaders of other countries.
Now that brings us to a problem. Can you imagine Donald Trump negotiating with the Prime Minister of England? Or of France. How about Trump meeting with Angelia Merkel? Please spare us the embarrassment!
But the absolute worst scenario: Donald Trump having an audience with the Queen of England.
Heaven protect us from such a tragedy!