New 25% trade tariffs on goods from Canada and Mexico went into effect early Tuesday after President Donald Trump declined to extend a 30-day pause in a move the president says aims to quell the flow of illegal drugs like fentanyl into the U.S. The new assessments also include a 10% tariff on Canadian energy products.

The president signed executive orders today offering a monthlong exemption, until April 2, for all goods covered under the U.S.-Mexico-Canada trade agreement, which includes most U.S. imports from those countries. About 10 percent of Mexico’s exports to the U.S. fall outside the U.S.M.C.A. trade agreement, according to one economist.