No stupid question… it seems Trump is ready to invade (military) Panama and Greenland (red white blueland), so even if with Canada he always talk about economic war and annexing Canada blablabla…
What would happen if USA invades Canada? What would be the reaction of the Canada King (Charles III is the king of Canada)? The Commonwealth? NATO?
It’s the world’s longest border, a military defeat is certain but hundreds or thousands of Canadian partisans will easily get through to commit acts of terrorism and sabotage.