US President Donald Trump has doubled his planned tariffs on all Canadian steel and aluminum imports to 50%, in retaliation for Ontario’s 25% tariff on electricity exports to the United States.

Trump said in a post on Truth Social that he had instructed his Commerce Secretary to impose an additional 25% tariff on the products, which will take effect Wednesday morning.

“Canada must also immediately drop its hostile tariffs on American farmers of 250% to 390% on various U.S. dairy products, which have long been considered excessive. I will soon declare a national emergency on electricity in the threatened area,” Trump wrote, according to Reuters.

Trump also threatened to “significantly” increase tariffs on cars entering the United States on April 2 “if Canada does not drop its other outrageous tariffs.”