During a press conference, The Toronto Star’s Tonda MacCharles noted she had been watching Carney’s facial expressions during the sit-down and was curious as to what had been going through his mind — particularly as Trump spoke about “erasing the artificial border” between America and Canada and mocked Carney’s predecessor, Justin Trudeau.

U.S. President Donald Trump and new Canadian Prime Minister Mark Carney faced off in the Oval Office and showed no signs of retreating from their gaping differences in an ongoing trade war that has shattered decades of trust between the two countries.