Tariff retaliation: Mexico and Canada immediately vowed to impose tariffs of their own. The Canadian prime minister, Justin Trudeau, announced retaliatory tariffs starting with 25 percent tariffs on approximately $20 billion worth of U.S. goods on Tuesday, with $85 billion more to follow within three weeks.

The US Chamber of Commerce warned Saturday that tariffs won’t solve the yearslong issues at the borders and instead threaten to “upend supply chains” and raise prices for American families.