Momentum behind Carney's Liberals

The NDP lost its first floor-crosser to the Carney Liberals the day after voting began for its new leader, further reducing a caucus that lost more than two-thirds of its members in the last election. Zain Velji, Michael Solberg and Carlene Variyan discuss what the future of the party could be, and what a long-term collapse would mean for Canada's political landscape.