Ontario will charge U.S. entities that import electricity from the province a roughly 25 percent surcharge tax that will cost importers about $400,000 per day, Ontario Premier Doug Ford said Monday, announcing the fee as retaliation for tariffs the U.S. imposed earlier this month. Ontario is prepared to up the surcharge or even shut off its electricity exports to the U.S. entirely, Ford said, promising that delays and exemptions will not be enough for him to lift the surcharge. President...