President Trump’s tariffs on Canada, China and Mexico could upend U.S. trade. These nine charts show what’s at stake, what comes next and why it matters.

The president’s trade assault, which makes no distinction between ally and adversary, is an assertion of U.S. dominance with significant risks.

President Donald Trump took action Saturday to impose new tariffs on Canada, Mexico and China, the White House said, which could have a sweeping impact on the American economy. The additional tariffs on Canadian and Mexican goods will be 25 percent,