Trump could be set to announce tariffs against Canada, China and Mexico. Here's what to know.

On the day of his inauguration, President Trump threatened steep new tariffs against key U.S. trading partners. Now he may be primed to deliver.   

Mr. Trump said Jan. 20 that he could announce 25% tariffs against Canada and Mexico as soon as Feb. 1, while China could face a 10% duty. Economists have warned that stiff tariffs could reawaken inflation on a range of consumer goods and slow economic growth. Here's what experts have to say.