In an exclusive interview with CBC’s The House, host Catherine Cullen asks Conservative Leader Pierre Poilievre how he makes sense of losing the Ottawa-area seat he held for two decades. Poilievre says public sector unions ‘ran a very aggressive campaign’ to defeat him. Read more: http://www.cbc.ca/news »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News