Remember that 5th grader from earlier? They already understood what Trump doesn’t: when you buy a toy for $50 at a store, you have a “trade deficit” with that store. You gave them $50, they gave you $0. But you also got a toy. That’s not the store cheating you — that’s just how buying things works.
Obviously this would be more difficult for Trump to grasp given his longstanding habit of not paying for things. People giving him money is a win, him giving other people money is a loss. Clearly the same must be true for trade.