But Trump announced time was up on March 3, and the tariffs went into effect overnight. Stock markets slipped, Canada ordered reciprocal tariffs, and by Thursday, Trump gave another 30-day extension to goods covered under the United States-Mexico-Canada Agreement, which applies to approximately 38% of imports from Canada.

Ontario Premier Doug Ford said a 25% surcharge on electricity sent to Michigan, Minnesota and New York, will be effective on March 10.

The Canadian province of Ontario is imposing a 25% surcharge on electricity exports to New York state, Michigan and Minnesota to protest against U.S. President Donald Trump's tariffs on Canada, Premier Doug Ford said on Monday.

President Donald Trump may have delayed most – though not all – of the tariffs he had imposed on Canada and Mexico, but that hasn’t stopped America’s northern neighbors from responding forcefully in retaliation.

President Donald Trump is not taking a passive approach to the escalating tariff war between the United States and Canada. Trump took to his Truth Social platform early Tuesday to announce a fresh wave of tariffs in response to Ontario Premier Doug Ford applying a tariff to the electricity it helps provide the American northeast.

President Donald Trump escalated his burgeoning trade war with Canada, declaring that he’ll double the steel and aluminum tariffs set to take effect tomorrow to 50 percent. Doug Ford gets under Trump’s skin: The president said the higher levies were payback for the Ontario premier’s own retaliatory move yesterday to add a 25 percent surcharge to electricity exports to three U.