At Issue this week: Prime Minister Justin Trudeau and the premiers hold an emergency meeting to figure out how to respond to U.S. president-elect Donald Trump’s tariff threat. The Liberals push through a GST break but stumble on the $250 cheques. And, is Pierre Poilievre undermining Canada’s unified approach to the tariff tensions? Rosemary Barton hosts Chantal Hébert, Andrew Coyne and Althia Raj.