(FILES) A sign on Interstate 75 directs motorists to Detroit or Canada, near the Ambassador Bridge in Detroit, Michigan, on August 1, 2025. Hefty US tariffs on some Canadian products took effect on August 22, 2026 after days of negotiations that went down to the wire failed to produce an agreement. Canadian Prime Minister Mark Carney vowed that his country will match the US tariffs "dollar for dollar to protect our workers and businesses," as officials said late Friday that Washington and Ottawa had not managed to strike a deal. (Photo by JEFF KOWALSKY / AFP via Getty Images)