Trump decides to excite his base and draw attention to himself by threatening to or actually banning immigrants from your country this week
difficult to plan for the future where this is a possibility
difficult to plan for the future where this is a possibility
Maybe Trump's mistake is being vocal about it while Canada maintains plausible deniability.
The Obama admin did the same thing. Sure it was technically possible to get a visa but in reality it was impractical and deliberately so.