CHICAGO (AP) — After trade negotiations crumbled at the eleventh hour, U.S. President Donald Trump's 50% tariffs on scores of Canadian imports kicked in Saturday.

OTTAWA - The United States is imposing a 50 per cent tariff on a range of Canadian exports starting Saturday, after the two countries could not reach a new deal

Canadian Prime Minister Mark Carney vows to retaliate, says his country recognized that 'America has changed' and that the two countries would 'not return to our old relationship'

The U.S. government is set to implement hefty tariffs on imports from Canada, which will influence roughly five percent of Canadian exports each year. Following failed…