US President Donald Trump’s olive branch to North Korean leader Kim Jong Un is sending fresh ripples of anxiety through Asia, as U.S. allies reassess how much they can rely on Washington amid concerns that the president’s shifting priorities could come at their expense.
Trump’s abrupt decision last week to scale back military exercises with South Korea, which he described as hostile to Pyongyang, has heightened fears that his unpredictable approach could strain alliances that have helped preserve peace in the region for decades.
Reuters reported on Monday that the decision comes at a pivotal moment for U.S. security ties in Asia, with Japan, Taiwan and India increasingly uncertain about where they stand in Trump’s strategic calculations.
"The decision will certainly fuel growing doubts in the region about U.S. security commitments," said Jeremy Chan, a senior analyst with political risk consultancy Eurasia Group and former U.S. diplomat in Japan and China.
A White House official said Trump had become frustrated by the failure of U.S. allies to support his war with Iran and had made clear that many of them must spend more on their own defence.
However, the official said Washington remained committed to working with Seoul.
Enmeshed in an unpopular war with Iran, Trump is eager to restart talks with North Korea and secure an international diplomatic success, according to a person briefed on discussions between U.S. and South Korean officials.
For Japan, Trump’s pursuit of renewed engagement with Kim has raised concerns that Pyongyang could emerge emboldened rather than restrained.
Itsunori Onodera, an influential Japanese lawmaker and former defence minister, warned that Trump’s push for talks could backfire and strengthen the position of nuclear-armed North Korea.
Such a prospect is "extremely troubling" for Tokyo, he said on a Fuji TV news programme last Thursday.
Despite Trump’s overtures, North Korea fired a volley of ballistic missiles off its east coast that same day, triggering alerts in neighbouring South Korea and Japan.
Japanese officials are also increasingly concerned as Tokyo prepares for difficult negotiations with Washington over how much it should pay towards the cost of hosting U.S. forces, America’s largest overseas military deployment.
A senior Japanese government official said Tokyo was bracing for the possibility that Trump could, with little warning, demand a sharp increase that would be politically difficult to accept.
Analysts say Trump could also use upcoming U.S.-Japan military exercises in October as leverage.
Officials in Washington and Tokyo said they did not expect the drills, known as Keen Sword, to be curtailed, although they cautioned that Trump could change his mind at any point.
The exercises may already be smaller than their 2024 iteration because U.S. personnel and military assets have been diverted to the conflict with Iran.
That shift has also heightened concern over America’s ability to deter China after the USS George Washington, the United States’ only forward-deployed aircraft carrier in Asia, left for the Middle East to relieve the beleaguered USS Abraham Lincoln.
During a visit to Asia this month, Pentagon policy chief Elbridge Colby said working with allies to ensure combat readiness along the so-called first island chain, stretching from Japan through the Philippines, remained a priority for Washington.
Taiwan, meanwhile, is watching closely as Trump prepares for a summit with Chinese President Xi Jinping in Washington next month.
The island faces growing pressure from China, which claims democratically governed Taiwan as its own territory.
Concerns have deepened after Trump held up approval of a US$14 billion arms sales package to Taipei while seeking to preserve warm relations and a fragile trade truce with Beijing.
Officials in Taipei expect Washington could split the proposed arms sales into smaller packages in an effort to avoid provoking China.
Domingo Yang of Taiwan’s Institute for National Defence and Security Research said there remained a distinction between Trump’s rhetoric and actual U.S. conduct, noting that American intelligence-sharing, military training and patrols involving Taiwan remained substantial.
A U.S. Navy aircraft transited the Taiwan Strait on Friday in a move Washington described as demonstrating its "commitment to a free and open Indo-Pacific."
Trump’s recent actions have also shaken confidence in India, where analysts fear the United States could squander years of efforts to draw New Delhi closer as a strategic counterweight to China and Russia.
The unease has been compounded by the Pentagon’s decision in June to rename its Asia military headquarters from Indo-Pacific Command to Pacific Command, a move some analysts interpreted as a sign that India had become less strategically important to Washington.
The Pentagon denied any such shift.
However, Trump’s steep tariffs on Indian exports and repeated claims that he had mediated an India-Pakistan ceasefire had already frustrated New Delhi.
Officials there are now "very, very cautious" about committing to long-term defence agreements with Washington, according to two Indian sources familiar with the matter.
"The latest decision only reinforces President Trump's transactional view of foreign affairs and serves as a reminder that differences over specific policies, even among allies, can carry costs for the broader bilateral relationship," said Pearl Pandya, senior analyst at Armed Conflict Location & Event Data, a conflict monitoring group.
For Washington’s allies, Trump’s decision to offer Kim an olive branch has become about more than diplomacy with North Korea.
It has revived a broader and increasingly urgent question over the future of U.S. leadership in Asia: how dependable is Washington when its alliances collide with the president’s shifting political and strategic priorities? - August 24, 2026
