When Justin Trudeau became Canadian Prime Minister in 2015, the world swooned. A young, unifying leader with a "sunny" vision for liberal democracy, following in the footsteps of his late father, Pierre. Nine years later, Justin Trudeau has stepped aside as PM at an inflection point for his country. Biographer Stephen Maher mulls the legacy of the mercurial Canadian leader: his achievements, his missteps, and what could've been. 

Guest: Stephen Maher, journalist and biographer, The Prince: The turbulent reign of Justin Trudeau