US President Donald Trump has warned that China could face a 50% tariff if it is found supplying weapons to Iran, according to reports from Reuters and the Associated Press. The comments add fresh pressure to already strained relations between Washington and Beijing.
The warning comes as the US continues to monitor international arms flows linked to Iran, a country under long-standing Western sanctions. The Trump administration has maintained a firm stance on restricting Iran’s access to advanced weapons systems and related military support.
Reuters reported that the tariff threat is part of a wider set of economic measures under review by US officials. These measures are linked to concerns over global security and enforcement of sanctions tied to Iran’s military program. The report said discussions inside the administration have focused on trade penalties as a tool of pressure.
The Associated Press also reported that US officials are reviewing intelligence assessments on potential supply chains that could connect Chinese firms to Iranian defense networks. No public evidence has been presented confirming direct transfers at this stage.
China has not issued a detailed response to the latest warning. In past statements, Beijing has rejected similar claims and said its trade activities comply with international law and United Nations rules. Chinese officials have often criticized US sanctions policy, calling it one-sided and politically driven.
Iran remains under multiple layers of US sanctions linked to its nuclear program and regional military activity. Washington has consistently accused Tehran of seeking to expand its missile capabilities and maintain ties with armed groups across the Middle East.
The proposed tariff threat highlights ongoing tensions between the world’s two largest economies. Trade disputes between the US and China have previously involved tariffs on a wide range of goods, but linking trade action directly to military supply concerns adds a new layer to the dispute.
Economists note that a 50% tariff, if implemented, would significantly raise costs on Chinese exports to the US market. However, no formal policy has been announced, and it remains unclear whether the proposal will move forward beyond political signaling.
The issue also comes at a time of broader instability in global trade relations, with several countries reassessing supply chains linked to defense, technology, and energy sectors. Analysts say such moves reflect growing overlap between trade policy and national security strategy.
US officials have not released a full list of companies or products that could be affected if tariffs are imposed. It is also unclear how enforcement would be structured in cases involving indirect supply chains.
As of now, the situation remains at the level of political warning and reported policy discussion, with no confirmed tariff implementation or formal sanctions expansion announced.
Sources cited in reports include Reuters and the Associated Press, both of which noted ongoing review of intelligence and trade options within the US administration.