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.

The operator of New York’s electric grid expects that President Donald Trump’s tariff on Canadian imports could increase power costs to New Yorkers.

NEW YORK (Reuters) - Swelling U.S. power prices may rise even faster in some parts of the country if 10% energy tariffs imposed by the Trump administration this week hit Canadian electricity supplies and trigger retaliation, according to energy experts and grid operators.