Trump's tariff plan would affect products from Canada, Mexico, and China. Here's what to know about tariffs, who pays them, and how they work.

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.

Economists worry that Trump's tariff plan will raise the prices of a range of imported goods, from cars to electronics.