Canadian Prime Minister Mark Carney said emphatically Tuesday that Canada is "not for sale" and "won't be for sale, ever" in an Oval Office meeting with President Trump, moments after Mr. Trump called the border between the U.S. and Canada "artificial" and romanticized the idea of Canada joining the U.S.

S itting next to President Donald Trump, Canadian Prime Minister Mark Carney got the clip he wanted Canadians to see: him telling Trump that Canada is “not for sale.” But over the course of the 33-minute exchange in front of reporters in the freshly gilded Oval Office,