Billionaire Warren Buffett criticized US president Donald Trump's tariffs on Canada, Mexico, and China as an "act of war", predicting economic harm. Trump’s tariffs will add significant costs to imports,

The rebuke of President Trump’s tariff plans came just days before sweeping tariffs on Canada and Mexico were expected to go into effect.

Warren Buffett says tariffs are “an act of war, to some degree.” Berkshire Hathaway’s chairman and chief executive said the country has had a lot of experience with tariffs, and that over time they are a tax on goods.