On Saturday night, shortly after 9 p.m. ET, Prime Minister Justin Trudeau delivered a speech on Parliament Hill announcing Canada's response to a 25 per cent tariff U.S. President Donald Trump is imposing on most Canadian goods.

Tariffs will be imposed by the United States on Canada starting this week. Earlier today, Trump's campaign promise became an executive order and

Tim McMillan, a former head of the Canadian Association of Petroleum Producers, warned that Ottawa should avoid the temptation to retaliate by cutting off oil supplies from Alberta, which make up half of U.S. oil imports, saying it “would be a huge mistake.”