This is gonna last longer then Trnup is in power. This is a real, tangible, long lasting shift in Canada-US relations. That’s not going to be fixed or restored whenever Trump is out of office. There will be a successor to this US isolationist ideology. The faster we decouple, disassociate and diversify from the US in every way, the better.
When you consider that foreign relationships take many decades to forge, it's unlikely that things will go back to the way they were for at least 20+ years.
If it ever happens.
And by then, the rest of the world would have already adapted to a life without the States, and many will be better off for it.
Majority of US army is in the Trump cult. There's no reasons to think they'd actually follow their oath when they worship a guy who shits on the constitution every 5 minutes.