The government of Ontario is applying a 25 percent surcharge starting Monday on electricity exports to three U.S. states in response to U.S. tariffs on Canada. This surcharge will affect electricity sales for 1.

Ontario’s leader said he will add a 25% export tax on electricity sent to New York and other states in retaliation for Trump’s tariffs. Ontario provides 2,500 of the 4,600 megawatts of capacity that New York draws upon from Canada, the NYISO reports.

Trump and his aides have reportedly threatened to redraw the northern border, go after Canada’s minerals and water, and cancel NORAD.