So, he starts a trade war so he can bully everybody into doing his bidding. If you don't understand, here's the point: If your government subsidises agriculture for example, so food can be cheap, they gotta take that out. Consequently, you're tempted to buy foreign, because that price advantage has been pretty much eliminated. In other words, the rich gets richer, and the poor gets poorer. Local companies are gonna get screwed in favour of foreign. Those that cannot compete fold up. In the end, the GDP of developing nations declines rapidly, while those of developed nations rise similarly. Trade deficits increase, currency depreciates, foreign debts increase drastically, & if you can't keep up, you're screwed. Soon we all need bail outs and we're making shady deals with the rich countries so we can at least have bread. The rest of G7 won't let it happen though. I'm just using it as a thought experiment.
Lots of love folks.