What's the point of negotiating with Trump? We had a trade deal negotiated with him that went into effect 5 years ago. Now he's doing all the shit we've seen for this whole year. 5 years is yesterday in political and economic terms. Also, you are wrong. He visited in May and October, so 2 visits in 7 months. And people all over the world have tried to make deals with Trump. Almost none of them have worked out at all, let alone well.
As for an actual war, with armies meeting in the field? I don't need to be a tactician to see that trying to go toe to toe with the country that spends more than the next 9 largest militaries in the world, which does not include Canada, is a fools errand. I also don't think our military leaders are fools. I'd be completely unsurprised to learn that they have a plan for guerilla warfare should America try to invade. In spite of their military spending, they haven't been successful against those since Vietnam, and we are uniquely positioned to bring a guerilla war into their territory.