Canada’s Prime Minister Mark Carney promised to roll out “dollar for dollar” retaliatory measures after U.S. President Donald Trump's 50% tariffs on scores of Canadian imports kicked in.

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'

Canada will match United States tariffs dollar for dollar after talks broke down. Washington plans to impose fifty percent duties on nearly twenty billion dollars of Canadian…