There is, actually. Instability where you win or lose based on which loony is next in driver's seat is not super appealing for folks on the outside, you know, those who get the stick.
WRT tariffs, both economists and more layman's explanations make it clear that, at the very, very least, the Trumpian view is out of touch with reality.
For example country A, having a massive trade deficit with country B, because you buy raw materials which you refine into products and sell to country C can absolutely be a good thing for country A - and it's very conceivable that imposing a tariff on the materials from B just undermines the profitable business in your country, as the margins from that industry is squeezed by the tariffs you imposed.
WRT tariffs, both economists and more layman's explanations make it clear that, at the very, very least, the Trumpian view is out of touch with reality.
For example country A, having a massive trade deficit with country B, because you buy raw materials which you refine into products and sell to country C can absolutely be a good thing for country A - and it's very conceivable that imposing a tariff on the materials from B just undermines the profitable business in your country, as the margins from that industry is squeezed by the tariffs you imposed.
For an interesting walk through tariffs, subsidies and whatnot, see https://m.youtube.com/watch?v=fSXGUGFncgk&pp=ygUPcGVydW4gdHJ... (Perun on trade wars).