Tariffs, Alliances and the Strait of Hormuz

Written By:
George Griffiths
George Griffiths
Head of Dealing

If “off ramp” was on your geopolitical catchphrase bingo card last week, congratulations. The search for stabilisation, rather than outright victory, has quickly become the central concern for policymakers confronting the current geopolitical maelstrom.

Yet the diplomatic dynamics surrounding the crisis may offer a way to address more than just the immediate maritime security problem.

In calling on Europe, Japan, South Korea, and even China to help secure the Strait of Hormuz, Washington has implicitly acknowledged that maintaining the stability of this critical trade artery may require a broader coalition than the United States alone. That request, however, comes at a moment when relations with many of those same partners are strained across several fronts, including tariff disputes, disagreements over NATO burden sharing, and divergent approaches to Russia and the war in Ukraine.

This creates a contradiction. The United States is seeking rapid international support in the Gulf at the very moment its wider policy posture has complicated the formation of such a coalition. That tension raises the possibility that the current crisis could push several actors toward tactical arrangements that relieve pressure across multiple areas simultaneously.

One factor may prove particularly decisive. In appealing to China to assist in reopening the Strait, Washington has introduced the possibility that Beijing could gain even a limited role in securing one of the world’s most critical maritime chokepoints. Operationally such participation might help stabilise shipping. Strategically, however, it would carry wider implications.

Control or protection of global trade routes has historically been associated with the dominant maritime power of the era. The Royal Navy in the nineteenth century, and later the US Navy in the post-war system, supported open maritime commerce. Even limited Chinese participation in safeguarding Gulf energy flows would therefore represent more than a practical contribution to maritime security. It would mark the first time Beijing had been invited to participate directly in securing one of the global energy arteries historically protected by the United States. It would signal Beijing’s emergence as a recognised stakeholder in the system the United States has historically overseen.

If that prospect is belatedly viewed in Washington as a dilution of authority, rather than the burden-sharing opportunity implied in Trump’s initial appeal, it creates a powerful incentive to assemble an alternative coalition. Doing so, however, may require repairing relationships with partners whose cooperation has recently been strained by trade disputes and other frictions.

Easing some of those tariff pressures could also have a more practical effect. For several partners already under pressure to increase defence spending, relief from trade frictions could make it easier to bring forward budget commitments that have been promised politically but not yet fully financed.

One development that could quietly assist such a recalibration lies in Washington’s own trade policy. The administration may soon find its room for manoeuvre on tariffs constrained by the courts. Legal challenges to the use of emergency authorities under the International Emergency Economic Powers Act have already reached the Supreme Court, and further scrutiny from the Court of International Trade could yet force a reconsideration of how certain tariff revenues are being collected.

If those pressures begin to limit the administration’s control of the tariff narrative, they may also create a politically convenient moment to ease economic tensions with allies.

Set against the immediate challenge of securing the Strait of Hormuz, these economic and legal pressures may take on a broader strategic significance. If Washington concludes that preventing Chinese participation in safeguarding one of the world’s most critical energy corridors is a priority, it will need a coalition of partners capable of assuming that role instead. In that context, easing trade frictions may become less a matter of economic policy and more a practical requirement of alliance management. What might otherwise appear as a domestic legal constraint could therefore provide the political space to adjust elements of the current tariff regime while assembling the coalition it now seeks.

The immediate question may be how to secure the Strait of Hormuz. The larger question is whether the current crisis will reshape who is ultimately seen as responsible for safeguarding the arteries of global trade, and whether that responsibility remains concentrated in a single maritime power or gradually becomes shared across several.

 

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