Last-minute phone calls pull the North American neighbours back from the brink of a trade war, but the US is still targeting Chinese imports.

Uncertainty surrounds the trade war touched off by Trump’s tariffs. But some of the basics are taking shape.

President Donald Trump made good on his promise to impose steep tariffs on America’s three largest trading partners — Canada, China and Mexico — citing a national emergency on the flow of fentanyl and undocumented immigrants into the United States.