Trouble is that anything that comes out of his mouth is possible. Conditions may arise such that he actually does invade Canada. Who knows what will happen or not?
I believe that this administration will mostly fall on its own sword. Political parties have lots of internal conflict. However, court challenges and street protests are important for keeping it off balance.
One unknown is whether the Supreme Court will defy, based on sound legal argument. Another unknown is whether Americans will turn out to protest in sufficient numbers (and risk their lives). We should not depend on either happening.
And if the administration does fall, what will replace it for the next 3.5 years? It could be better. It would be worse.
So much drama left to play out.
If only the USA had listened to me in 2009!