Canada thought it was making good progress in negotiations with the Trump team - then he announced even higher tariffs against it. Vietnam thought it had agreed a deal with a much lower tariff figure, but then Trump simply announced a higher one. The first countries through the gate are finding - and the rest of the world is noting - that nothing Trump or his team say can be trusted, that any deal can simply be changed at a whim, and this is not a serious process. So what does the world do about it? Let's discuss.