Trump threatens 50% tariff on China over Iran weapons claim

Former U.S. President Donald Trump threatened a 50 percent tariff on Chinese goods if Beijing is caught delivering new air defense systems to Iran, a move that sharply raises economic stakes between the two countries ahead of a critical summit. The warning follows the collapse of U.S.-Iran peace talks and a new American blockade of the Strait of Hormuz, which has already spiked oil prices and heightened fears of a global recession.

"If we catch them doing that, they get a 50% tariff, which is a staggering — that's a staggering amount," Trump said in a Sunday interview on Fox News. His comments were a direct response to a CNN report, citing U.S. intelligence assessments, that China was preparing to ship man-portable air defense systems (MANPADS) to Tehran.

The threat injects fresh volatility into global markets, which are already reeling from the U.S. blockade on vessels exiting the Strait of Hormuz. The blockade was announced after peace talks in Islamabad, led by Vice President JD Vance, fell apart, with Iranian state media citing "unreasonable demands" from the U.S. Oil prices have surged on the news, compounding concerns of a broader economic downturn.

This latest escalation puts a sharp focus on the upcoming May 14-15 summit in Beijing, where Trump is scheduled to meet with Chinese President Xi Jinping. The tariff threat, linked directly to China's geopolitical actions, transforms the meeting from a trade negotiation into a high-stakes diplomatic standoff.

China's Calculated Risk

While Beijing has officially supported peace talks, its role has become increasingly scrutinized. If confirmed, the delivery of weapons to Iran would represent a significant shift in China's strategy, moving from cautious ally to a more direct supporter of Tehran's military capabilities. "China seems to be selectively wielding its influence and... willing to engage in a more proactive way when it senses an opportunity to make an impact," said Dylan Loh, an associate professor at Singapore's Nanyang Technological University.

Analysts suggest Beijing's motives are rooted in economic self-interest rather than a fundamental foreign policy realignment. China's economy is heavily reliant on seaborne exports and vulnerable to any prolonged closure of the Strait of Hormuz. According to Kpler, China purchased over 80 percent of Iran's sanctioned oil exports in 2025, accounting for more than 10 percent of its total demand. Despite Chinese-flagged tankers reportedly receiving passage, domestic gasoline prices in China have still climbed by roughly 11 percent, prompting a government cap on further price hikes.

"Beijing's economy remained fundamentally reliant on seaborne exports, and would therefore be vulnerable to an economic downturn resulting from a prolonged closure of the Strait of Hormuz," Zongyuan Zoe Liu, a senior fellow at the Council on Foreign Relations, told CNBC.

A Credible Threat?

Trump's history of dramatic threats followed by reversals, a tendency critics label "TACO" (Trump Always Chickens Out), raises questions about his follow-through. The president has previously made and then walked back incendiary comments, including threats to bomb Iranian infrastructure.

However, his administration has also demonstrated a willingness to use tariffs as a primary tool of foreign policy, notably against China itself. Before a U.S. Supreme Court ruling declared his emergency law-based tariffs illegal, Trump had imposed tariffs as high as 125 percent on Chinese goods, later reducing them to 30 percent after bilateral talks. The current threat appears to be a new attempt to wield economic pressure for geopolitical leverage, bypassing congressional oversight.

"I think if [Trump] has solid evidence that China is prepared to help Iran in a substantial manner, he will respond," Loh said. The world will be watching the Beijing summit for the answer.

This article is for informational purposes only and does not constitute investment advice.