Firing the opening salvos of a trade war, Donald Trump said his reasons were simple: stop “illegal aliens” and put an end to the flow of fentanyl, a deadly opioid, on to America’s streets.

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.

As China and the U.S. battle over tariffs, locked in a tussle that could result in a deal or a trade war between the world's two largest economies, staying away from China's stock market is becoming the default option for foreign investors.