The ongoing trade war between the United States and China represents one of the most severe deteriorations of trade cooperation in modern times. In this context, the ferocious trade rhetoric accusing China of breaking promises in trade policy is striking. A previously unexamined question in this context arises: How does this rhetoric shape individual attitudes toward bilateral trade cooperation? My analysis of original survey experiments from the United States and China (n = 4181) suggests that this type of rhetoric has important ramifications. Experimental evidence from both countries suggests that individuals react more strongly to rhetoric emphasizing negative than positive past behaviour of the trading partner. Overall, this pattern prevails independently of the identity of the trading partner. Promise-breaking trade narratives, a key contextual dimension of the US-China trade war, diminish the perceived level of trustworthiness of the other country. A conjoint analysis suggests that individuals’ trade cooperation attitudes are also shaped by rhetoric targeting issue areas beyond trade, such as military affairs and human rights. These findings highlight the importance of contextual factors accompanying the US-China trade war context. Thereby, this article emphasizes the potential for political elites to effectively leverage fundamental individual fairness principles for invigorating opposition to open trading relations.