Chief political correspondent Rosemary Barton speaks with former Liberal cabinet minister Mary Ng, former Conservative cabinet minister Lisa Raitt and former NDP MP Nathan Cullen about post-debate momentum and the parties' platforms. Plus, the Sunday Scrum with CBC Radio host Catherine Cullen of The House, National Post parliamentary reporter Catherine Lévesque and Globe and Mail energy reporter Emma Graney. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC