U.S. President Donald Trump’s sweeping tariffs on the country’s biggest trading partners have ignited a global trade war that could weaken the economic growth of all parties involved. On March 4, Trump followed through on his threat to impose 25% tariffs on imports from Canada and Mexico and an additional 10% levy on China.

Canada, Mexico and China are hitting back with retaliatory tariffs. The moves raised fears of higher prices for U.S. consumers and a trade war.

Good morning. China and Canada strike back as Trump’s tariffs kick in. A bank’s copy-paste error almost made someone $6 billion richer. And executives are changing their climate tune. Listen to the day’s top stories.