With his nomination, Trump is leaning on a former business executive-turned politician to serve as the administration's envoy to America's most potent economic and military adversary.
Trudeau flew to Florida on Friday to have dinner with President-elect Donald Trump at his Mar-a-Lago club after Trump threatened to impose sweeping tariffs on Canadian products.
President Biden used to tell world leaders "America is back," implying the Trump era's go-it-alone ethos was a one-term blip. But Biden needs a new line for this week's APEC and G20 summits.