Mr. Speaker, it is well noted that the Prime Minister is refusing to respond to a party leader. This is a breach of parliamentary protocol and tradition. It is what happens when there is no possible answer to a Minister of National Defence who has told a whopper about his record. That is not something one would apologize for. It is something one has to step down for.
In the House of Commons on May 1st, 2017. See this statement in context.