The Cato Institute has published a new analysis addressing a question that has moved from hypothetical to practical in Washington trade policy circles: what happens if the United States leaves the World Trade Organization?

The analysis, released by the libertarian-leaning Washington, D.C. think tank, confronts a scenario that has gained salience as U.S. trade policy has grown more unilateral over successive administrations. Years of blocked judicial appointments to the WTO's Appellate Body, sweeping unilateral tariff actions, and open skepticism from both major parties toward multilateral dispute settlement have made the question of outright withdrawal a live policy debate rather than an academic exercise.

The institution at issue

The WTO, established in 1995 as the successor to the General Agreement on Tariffs and Trade, administers the rules of international trade among its 164-plus members and provides the machinery for resolving trade disputes. The United States was a principal architect of the system and remains one of its largest members by trade volume.

Under Article XV of the Marrakesh Agreement Establishing the WTO, a member may withdraw from the organization. The provision requires a member wishing to withdraw to give written notice to the Director-General of the WTO, and the withdrawal takes effect six months after the notice is received. That is the formal legal mechanism the Cato analysis sits against.

Why the question matters now

The United States has spent years at loggerheads with the organization's dispute settlement arm. By blocking the appointment of new members to the Appellate Body, the United States effectively immobilized the WTO's highest trade tribunal in December 2019, when the body fell below the minimum of three members needed to hear appeals. That decision reshaped how member states enforce trade commitments against Washington and one another.

Trade lawyers and policymakers have since debated whether the United States should work within the system, continue to starve it of judicial capacity, or leave it altogether. The Cato Institute's analysis joins that debate by walking through the consequences — legal, economic, and diplomatic — of a full American exit.

What practitioners should watch

For trade practitioners, the analysis's core question translates into concrete practice concerns. If the United States withdrew, U.S. trading partners could lose access to WTO dispute settlement as a forum for challenging U.S. tariff and regulatory measures, pushing conflicts into unilateral retaliation, bilateral negotiation, or alternative mechanisms such as the Multi-Party Interim Appeal Arbitration Arrangement (MPIA) that some members adopted after the Appellate Body's paralysis.

Conversely, the United States would give up its own ability to invoke WTO rules against trading partners. Exporters facing foreign tariffs, quotas, or regulatory barriers abroad would lose the treaty framework that currently disciplines such measures, leaving diplomatic pressure and domestic remedies as the principal tools.

Questions would also arise about the fate of U.S. commitments made under WTO accession schedules — bound tariff rates, commitments on services, and subsidy notifications — and whether negotiating positions under the WTO's ongoing deliberative work would carry over to any successor arrangements.

A debate with no settled answer

The Cato Institute's contribution is analysis rather than advocacy for any particular outcome before a court or regulator. No case, ruling, or filing triggers it. Its significance lies in the seriousness with which a major policy institution now treats the prospect of withdrawal.

The WTO has survived previous stress tests, including the Appellate Body crisis and stalled multilateral negotiating rounds. Whether it would survive the departure of its largest founding member is the question the analysis poses — and the answer will shape how trade lawyers, exporters, and governments plan for the next decade of commercial policy.

The full analysis is available through the Cato Institute.