Follow for live updates after President Trump’s tariffs on goods from Canada, Mexico and China went into effect, and for reaction from world leaders, companies and markets.

Growth expectations for the U.S. economy are falling as China and Canada announce their next move in the tit-for-tat trade spat with the White House.

President Donald Trump's 25% tariffs on Canada and Mexico, and the doubling of 10% levies on goods from China, took effect Tuesday—and Beijing and Ottawa immediately hit back.