Telling a sovereign nation, and the US’s closest ally, it should become the 51st US state isn’t making war, but it’s way more than imposing tariffs in contravention of treaties this president signed in his last term.
It's just a joke. A bad joke, but just a joke. Republicans are afraid to add Puerto Rico as a state for fear of it voting Democrat, they would never allow Canada to become a state even if you wanted to (or rather, 10 states), because they would never win an election again.
America repeatedly threatened annexation and wanted water. It demands registration of goverment citizens. They call premier governor. Tariffs seem ti be preparatory steps meant to weaken Canada as a preparation for further attacks.
In general, conservatives are nowhere near to do the awful thing they say loudly they will do - and then, each time, they do that exact thing. Again again and again. These are plans and ignoring them is a self delution.