Trump’s Call for Asian Allies to Help Unblock Strait of Hormuz Is ‘a Test’: Analyst

CNA (Channel NewsAsia)
CNA (Channel NewsAsia)Mar 18, 2026

Why It Matters

The standoff tests the durability of U.S. security ties in Asia and could reshape energy‑security dynamics, influencing both election politics and the broader strategic balance with China.

Key Takeaways

  • Trump pressures Asian allies to intervene in Hormuz crisis.
  • Japan, South Korea, Australia cite legal constraints on deployment.
  • Allies view request as loyalty test, risking long‑term friction.
  • Iran’s attacks on UAE energy raise global oil price concerns.
  • U.S. election politics amplify tensions within the Indo‑Pacific alliance.

Summary

President Donald Trump publicly urged Japan, South Korea and Australia to deploy naval forces to reopen the Strait of Hormuz, framing the request as a test of alliance loyalty amid the escalating Iran‑U.S. conflict. The demand comes as Iran’s recent strikes on UAE energy infrastructure have spiked global oil prices and heightened concerns over supply disruptions.

Analysts note that each ally faces distinct legal and political hurdles: Japan’s pacifist constitution limits overseas combat deployments, South Korea balances domestic opposition and its own security priorities, and Australia must weigh regional commitments against a war it does not support. The pressure is amplified by the 2026 U.S. election cycle, where Trump’s rhetoric about “foolish” NATO allies seeks to rally his base and underscore perceived U.S. isolation.

Council on Foreign Relations senior fellow Sheila Smith described the move as “a clear loyalty test” that could erode long‑standing strategic interdependence. She highlighted Japan’s Prime Minister Takichi’s parliamentary statements that self‑defence forces cannot be sent abroad in wartime, and warned that public opinion in the three nations remains broadly anti‑war.

If allies refuse, Washington risks fraying its Indo‑Pacific network at a time when China’s assertiveness around Taiwan intensifies. The episode underscores how regional security, energy markets and domestic politics intersect, potentially reshaping U.S. alliance management and prompting Japan and others to explore independent diplomatic channels with Tehran.

Original Description

United States President Donald Trump lashed out at NATO on Tuesday (Mar 17), calling some of its members’ refusal to get involved in the US-Israel war on Iran a “very foolish mistake”. Trump called out Japan, Australia and South Korea by name, insisting Washington did not need their help. He had previously urged Asian countries – including China – to deploy warships to unblock the Strait of Hormuz. Sheila Smith, John E Merow senior fellow for Asia-Pacific studies at American think-tank Council on Foreign Relations, says it will be a difficult topic for Japanese Prime Minister Sanae Takaichi, who will be the first head of state to speak to Trump about it when she arrives in Washington on Thursday. Trump’s call is also “a test” of alliances, Smith tells CNA’s Asia First.
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