Susan Delacourt of the Toronto Star tweets
So what's with the Conservatives now referring to Justin Trudeau as "Liberal leader" instead of Prime Minister, in Question Period? Aren't MPs supposed to be addressed by parliamentary title?
Which Chantal Hebert responds on twitter
It did remind me of the rather lame decision to only call him Justin in the last campaign. A lot of good that did the Conservatives
Then Susan Delacourt follows up
Here are the rules on how PM should be addressed in chamber (not as "Liberal leader"). One assumes Andrew Scheer, former Speaker of the House of Commons, knows this.