The same day that President Trump hosted the Australian prime minister in New York aboard the decommissioned aircraft carrier Intrepid, a political meeting of a different sort took place farther north.

I am talking, of course, about the sit-down on Thursday between Prime Minister Justin Trudeau of Canada and Prime Minister Enda Kenny of Ireland. And though you might think it was what Melania Trump wore to the black-tie dinner on the Intrepid that should have made sartorial waves (it was a yellow one-shouldered Dior, for the record), in fact, it was Mr. Trudeau’s outfit in Montreal that got everyone talking.

Specifically, his socks. Specifically, his mismatched “Star Wars” socks, one in blue and gray with R2D2 and the other in gold and black depicting C3PO. They were impossible to miss set against his dark suit, white shirt, and red tie.