So, I guess the opposition supports associate membership in everything but name.
It doesn't matter what the truth of the matter is. What Dear Leader says is used as a scare tactic and marching orders for the underlings to believe and repeat. If you live/interact with conservative people long enough you see the pattern. There's absolute trust in what their leadership says, but skepticism for any criticism of those same talking points.
So all this tweet is doing is seeding doubt, and distrust among the electorate. It doesn't have to be true, but if the goal is to maintain control it looks like this. The Canadian Conservatives are still extremely pro-USA but have learned to keep their opinions close to the chest because they're currently politically unpoular.