I think trump will end up with over ½ the world paying the usa tariffs.
I do not think it will get to that point, there are a lot of factors to be considered here. Take these for example, economic backlash, corporate opposition, and potential Congressional pushback. these could limit the extent of his full-blown trade war. I think trump will eventually calm down on all these battles he is waging with everyone, its just a matter of time.