The Scots are generally not fans of Mr. Trump, and protests were already planned for Saturday. A group called “Stop Trump Scotland” said it was organizing a “festival of resistance” against Mr. Trump during the trip and has called on John Swinney, the first minister of Scotland, to cancel plans to meet with him.

European Commission President Ursula von der Leyen announced that she is to meet with US President Donald Trump during the weekend in Scotland in a post on Friday, amid fears about the looming tariff cliff.