WASHINGTON: US President Donald Trump’s high-profile diplomatic engagements this week — from his address to the United Nations General Assembly to his White House summit with Chinese President Xi Jinping — have highlighted the growing constraints on his ability to shape international affairs.
Trump sought to project American strength on the global stage, defending his foreign policy and warning Iran over its nuclear programme while promoting his administration’s diplomatic achievements. However, his week of intense diplomacy also exposed resistance from allies and rivals on several major foreign policy fronts.

The most closely watched event was Xi’s visit to Washington. Despite the elaborate ceremony surrounding the Chinese leader’s state visit, the summit produced limited concrete results, with the two sides mainly agreeing to extend an existing trade truce by two months.
Sensitive issues including trade, artificial intelligence, Taiwan and the conflict involving Iran remained unresolved. Chinese state media also reported that Xi urged Trump to oppose Taiwanese independence.
Trump’s approach towards Beijing appeared considerably less confrontational than his earlier tariff-heavy strategy, as China’s control over rare-earth minerals continues to give Beijing significant leverage over key technology and manufacturing supply chains.
The Iran conflict remained another major challenge for the US president. The war, which began with US and Israeli strikes on Iran on February 28, has continued for nearly seven months, disrupting energy supplies and increasing pressure on the global economy.
Trump defended the military campaign in his UN address and warned Iran of further consequences if it failed to reach an agreement with Washington. However, Iran has continued to resist US demands, turning the conflict into one of the most difficult foreign-policy challenges of Trump’s second term.

The president has also faced resistance from several US allies. European and Asian partners have largely rejected calls for greater involvement in the Iran conflict, while some leaders used their UN addresses to criticise the broader use of military power and coercion in international affairs.
French President Emmanuel Macron warned against a return to a world governed by force, while Brazilian President Luiz Inacio Lula da Silva stressed cooperation rather than military intervention.
Trump’s efforts to push Russia and Ukraine towards a limited energy ceasefire have also produced little visible progress. Meanwhile, negotiations involving Denmark and Greenland resulted in discussions over an expanded US military presence but fell short of Trump’s earlier demand for US ownership of Greenland.
The developments suggest that foreign governments are increasingly prepared to resist Washington’s demands rather than automatically align themselves with the Trump administration.
Trump’s domestic political position could further complicate his foreign-policy ambitions. With the November midterm elections approaching and the Iran conflict proving politically divisive, control of Congress could become an important factor in determining the president’s room for manoeuvre.

Still, Trump’s week of diplomacy demonstrated that he retains substantial influence on the global stage. His UN address, the Xi summit and his continued involvement in conflicts from the Middle East to Ukraine showed that Washington remains central to major international affairs.
But the results also underscored a gap between projecting American power and translating that power into concrete outcomes.
As Trump himself acknowledged during his UN speech while discussing the future of artificial intelligence: “Let’s see if I have any power. Maybe I do and maybe I don’t. We’re going to find out pretty soon.”
Header image: US President Donald Trump addresses the 81st United Nations General Assembly at UN headquarters in New York City, US on September 22, 2026. —Reuters
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