That, and I think there's a chance they can get Ardern out in NZ. She went into hiding a day after Trudeau using the same excuse.
I think Trudeau and Ardern are just wind up mouths who bring nothing to the table if the programmers writing their lines don't know what to tell them, or are able to tell them anything that will work. Both should have a big presence in the situation unfolding, but, in Canada, Trudeau has left that to the Mayor and City Council. Chickenshit level behavior for a PM.
If I had to guess, I think CA and NZ are probing attacks to see what the DS will bring, and that that will be used to fine tune a US convoy timed with the TS rollout. You can put a lot of asses in the seats on day 1 with TS exclusive convoy coverage, especially if they have embeds riding along.