Canada could possibly cut energy exports to some northern border states if president-elect Donald Trump imposes a 25 percent tariff on all Canadian goods after he takes office next month, a Canadian official warned late Wednesday.

US President-elect Donald Trump is doubling down on his threat to impose a 25 per cent tariff on goods from Canada and Mexico.

A senior Canadian official is threatening to cut off electricity to some 1.5 million Americans and ban the import of US-made beer and liquor as part of a potential trade war with the incoming Trump administration.