Reciprocity, often understood as "tit-for-tat" in diplomacy serves as a foundational mechanism for bilateral and multilateral engagements in international politics. It facilitates mutual exchanges among states to pursue national interests and foreign policy objectives. This paper critically analyses President Donald Trump’s tariff policy toward America’s immediate neighbours shortly after taken office. The policy is viewed as hegemonic rooted not in mutual trust or cooperation, but in advancing U.S. strategic economic interests. The study explores Trump's rationale for imposing a 25% tariff on imports from Mexico and Canada, and a 125% tariff on Chinese goods, under the justification of combating illegal immigration, drug trafficking, and protecting national security. The consequences of these measures ranging from trade wars with countries across Central America, Europe, and Asia to domestic political backlash and inflations which are thoroughly examined. This paper proposes renegotiating trade laws on equitable diplomatic platforms to mitigate the crisis and prevent large-scale global trade disruptions. It also emphasises the crucial role of the World Trade Organization (WTO) in establishing fair rules for state behaviour in tariffs, markets, and investment. Utilizing secondary data from scholarly publications, government documents, and online materials, the study adopts the theory of reciprocity in international relations as its analytical framework to explain the motivations and impacts of Trump’s tariff policy on global diplomacy and interdependence of states.