Pierre Poilievre is heading across the border to the United States with backing from the Prime Minister's Office. The trip lands amid growing friction.
President Donald Trump is stepping up pressure against Canada. Canada's counter-tariffs on U.S. goods are being applied right away.
Trump says Canada is desperate for a trade agreement as he keeps up the pressure. Prime Minister Mark Carney is updating the approval process for major energy projects.
U.S. envoy Jamieson Greer lays the blame at Canada for the American response. Economists see modest fallout from the tariffs.
One economist calls it not an escalation rather than a sharp turn. Some question Canada's strategy as the dispute drags on.
American late-night television hosts mocked him over the dispute.