Host Piya Chattopadhyay speaks with The Economist's Rob Russo and The Globe and Mail's Stephanie Levitz about how Canadian politicians are responding to Donald Trump's tariff threat, historian Evan Friss explores why bookstores endure against the odds, researcher Carolyn Whitzman shares approaches to solving Canada's housing crisis, and our monthly challenge That's Puzzling! returns.

Discover more at https://www.cbc.ca/sunday