It is now commonplace to point out that economic exchange can and should be positive-sum: When it works well, both buyers and sellers get more value than they would by not participating. This is followed up by saying that Trump thinks of exchange as zero-sum: Any time one side gets value, then they must be taking it from the other. It now seems to me that this is wrong about Trump— not unfair, but wrong.
The current tariff strategy is, even in his vision for it, a negative-sum gambit. He is willing to crash the whole plane, because he thinks that he and the USA will be on the top of the hierarchy among the people scrambling for survival among the wreckage.