WASHINGTON - United States President Donald Trump's trade czar is downplaying the impacts of the new tariffs that took effect over the weekend, even as Trump himself moved to escalate

After trade negotiations crumbled at the eleventh hour, U.S. President Donald Trump’s 50% tariffs on scores of Canadian imports kicked in over the weekend

United States President Donald Trump imposed fifty percent tariffs on Canadian imports. Canada's Prime Minister Mark Carney promised matching retaliatory measures starting…