Katie Telford has been described as Canadian Prime Minister Justin Trudeau's "right hand," and on Friday, the chief of staff appeared in front of a parliamentary committee looking into foreign interference in Canadian elections. During her testimony, she often cited national security as limiting what she could say about alleged Chinese interference in the last federal election. Mackenzie Gray reports. Plus, David Akin gives an analysis of Telford's testimony and explain why Liberals are under pressure by opposing parties amid the foreign interference allegations.