I really doubt there will ever be an invasion of Canada. Barely anyone in America would go along with a massive war (and that’s what it would require). Congress doesn’t want it — not even Republicans. The business community doesn’t want it. Maybe a few hardcore MAGA types would be willing to fight for him but in reality, most MAGA types are old, fat slobs, not young people of fighting age.
Plus, we couldn’t occupy Iraq and Afghanistan. There’s no way we’d be able to occupy all of Canada. (Especially Quebec. It seems like they’d sooner fight to the death than become Americans.)
Having a midlife crisis and suddenly dressing like you're really into the world’s shittiest rap-rock band generally doesn’t endear you with the public. Especially not when you’re laying people off by the tens of thousands.