President Donald Trump threatened to bar Bombardier from the U.S. market unless the Canadian aircraft manufacturer moves production to the United States, escalating a trade confrontation as Ottawa prepares retaliatory tariffs. Trump renewed pressure on the company after a January dispute over certification of Gulfstream aircraft, when proposed tariffs and decertification of Bombardier Global Express jets were ultimately not implemented. Canadian Finance Minister François-Philippe Champagne has outlined duties of 15% to 50% on roughly $20 billion of U.S. goods beginning at midnight on Sept. 8, a figure that differs from an earlier reported $27.6 billion tariff package. The broader dispute has included U.S. tariffs on Canadian products, stalled negotiations over auto duties, and Trump's threat to raise levies on Canadian vehicles, auto parts and steel to 50% from January 2027. Canada's August employment decline and the countries' large cross-border trade exposure have added economic urgency to the dispute.