The tariffs do not apply to energy products, potash, critical minerals or products already covered by existing steel, aluminum and other national security tariffs. White House points to Canadian trade policiesTrump relied on Section 338 of the Tariff Act of 1930, which allows a president to impose tariffs of up to 50% on imports from countries found to discriminate against U.S. commerce. “If these tariffs proceed, Canada should respond tariff for tariff, dollar for dollar.” If these tariffs proceed, Canada should respond tariff for tariff, dollar for dollar. “You gotta remind President Trump that there’s 3.9 million acres burning in the United States right now,” Ford said.