Yes, that's true and I already made a questioning remark about WTO's existence without US. However like many others I hope US should not bully other nations and this should stop. As US currency is the most global, I believe US is always in profits with or without tarrifs. All this tarrif-tarrif is a mere drama and Trump's been manipulating the market to fill his/his family's pockets because he knows that he won't get a better and another chance to do it.