Photo by Henry Nicholls-Pool/Getty Images Who else can get away with gently mocking President Trump besides the King? A motif of his four-day visit to America has been the prodding gibe. “You recently commented, Mr. President,” King Charles said at the state dinner this week with an arched eyebrow, “that if it were not for the United States, European countries would be speaking German – dare I say that, if it wasn’t for us, you’d be speaking French!”. And dare he did. It speaks to Charles’ stature, and to his close relationship with Trump, that such teasing was deemed permissible. As ever, the monarch has been able to keep Trump in proportion more than the Prime Minister ever has. The trip was going well at this point. He was soon pictured in Virginia’s vertiginous Blue Ridge Mountains where he came eye to eye with a bald eagle. Monarch versus beast. Two bank note portraits facing off.…