`  :It would be best to continue the conversation at the Trudeau article, but I think the issue that you're going to run up against is that Wikipedia doesn't exactly take the Liberal Party of Canada constitution as the Holy Scriptures.  What Wikipedia cares about is what reliable sources say, and virtually every reliable source has not recognized some sort of gaping ``vacancy`` in the leadership of the party for the past few years.  Ignoring even common usage for a minute, though, even the Liberal Party's constitution itself says: ``The person appointed as the Interim Leader may exercise all the powers of the Leader under this Constitution until a new Leader is elected by the members of the Party.``  I don't see anything there explicitly calling the interim leader some sort of separate ``office.``  So, for all intents and purposes, an interim leader is still the leader, even if they were selected differently.  In any event, I'd encourage you to make your case at the talk page for the Trudeau article.  If consensus agrees with your interpretation, we'll go in that direction.    `