Untested in court, Trump’s new tariffs on Canada raise legal questions

WASHINGTON (AP) — In firing up a trade war with Canada, President Donald Trump turned to a 96-year-old statute so obscure that many trade lawyers didn’t even know it was still on the books. A week ago, Trump invoked Section 338 of the Tariff Act of 1930 to slap a 50% tax on $20 billion worth of Canadian imports. The move prompted dollar-for-dollar retaliation from Ottawa and strained already-tense relations between the neighbors and longtime allies. Advertisement Article continues below this ad The president’s Section 338 tariff authority has never been used, let alone tested in court. “This law is…