The president-elect said that he would impose the across-the-board tariffs on Day 1 and that they would stay in place until Canada, Mexico and China halted the flow of drugs and migrants.

Mexico and Canada are the United States’ top two trading partners, accounting for nearly 30% of trade volumes.

President-elect Donald Trump said he would impose the import tariffs — 25 percent for Canada and Mexico and 10 percent for China — as soon as he takes office.