The Trudeau government and regional leaders have put into place a retaliation strategy that's ready to go as leaders call for a national buy-Canadian response to President Donald Trump's tariff plans.

Outgoing Canadian Prime Minister Justin Trudeau says prices for Americans will go up if President Donald Trump follows through with his vow to apply sweeping tariffs on Canadian products.

"Continental energy security" was the watchword of both governments and industry for much of the past quarter century in North America: the idea that by linking the U.S. and Canada in a tight web of pipelines and refineries,