I see what you mean. However, I think there's a minor disconnect: I can easily see how e.g. the US might want to block sales from China to e.g. Brazil, but the

I see what you mean. However, I think there's a minor disconnect: I can easily see how e.g. the US might want to block sales from China to e.g. Brazil, but the way from wanting a goal to having an agreement ratified by both countries is long and involves painful phases like getting internal agreement about the concessions made.