

It doesn’t really matter what happens with nato, trump is technically commander in chief of the armed forces and just the chaos alone of the first few hours and days is where it makes all the difference. Jan 6 for example would have looked a whole lot different under a different sitting president where the national guard and military were sent in when they should have been, because as it was, disaster was minutes and tens of feet away that day.
China has nukes, a gargantuan military with no other purpose than to fight back, and the internal cohesion to resist the pressure. Canada has a much smaller military spread out much further, a much higher dependence on US specific trade simply by nature of physical infrastructure, and an unfortunately not insignificant percent of the population in the central provinces who would probably side with the US. It’s not anbout fighting back, it’s all about who is easier to bully, where friends mean nothing because everyone’s worth is determined by how much he can exploit them and the leverage the us has over them.