Trump has justified tariffs on goods from Canada, the top U.S. export market, by accusing it of failing to stop the cross-border flow of fentanyl, even though U.S. government data shows Canada accounts for only 1% of the fentanyl that enters the United States.

President Trump has long wanted to rework world trade. The tariffs set to go into effect next week will carry out that plan.

President Donald Trump’s trade war strategy is yielding results, but economists warn of potential risks to the global economy.