Canada's spy chief sounds alarm about foreign interference

CSIS director David Vigneault has testified on Parliament Hill about foreign meddling, calling the Chinese Communist Party the “principal threat” to Canada's democratic institutions. Mackenzie Gray reports on what Vigneault was asked about, how he responded, and David Akin explains why Prime Minister Justin Trudeau is resisting the growing pressure to call an inquiry, and how the opposition parties disagree over what an inquiry would look like.