CBC's Rosemary Barton explains everything we know about Alberta Conservative MP Matt Jeneroux's decision to cross the floor to the Liberals, and rumours that more Conservatives could still follow. Then, former Conservative campaign manager Fred DeLorey and former Liberal campaign co-chair David Herle discuss the potential of a Liberal majority, which could now be completed with a win in a Quebec vote that DeLorey calls 'the most consequential byelection in Canadian history.'