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.

President Donald Trump's broad tariffs on imported goods from Mexico and Canada went into effect on Tuesday, along with increased duties on goods from China.

U.S. forecast to enter recession after Trump crashes markets with tariffs on Canada, China and Mexico: Live - President’s ...