A new confrontation over the International Criminal Court is hardening into a test of whether Europe and other supporters of the rules-based international system can protect one of its most controversial institutions from sustained pressure by the United States. President Donald Trump used his address to the United Nations General Assembly this week to urge countries to leave the Hague-based court, escalating a campaign that his administration says is necessary to defend American sovereignty and allies from an institution Washington regards as illegitimate. The immediate diplomatic response has been limited: Naoero, the Pacific island state formerly known as Nauru, announced that it would withdraw, while major European governments and Japan instead reaffirmed support for the court. The larger danger for the ICC, however, may lie less in defections than in the financial and operational consequences of additional U.S. sanctions that officials have prepared against the institution itself.
A confrontation moves from rhetoric to institutional pressure
Trump’s latest demand came during a United Nations week already dominated by disputes over war, sanctions, alliances and the future of multilateral institutions. In his September 22 speech, the president attacked the ICC and urged its member states to leave. Reuters reported on September 24 that only Naoero had followed that appeal during the General Assembly gathering, while the Netherlands, the European Union and Japan publicly defended the court. That contrast matters because the ICC is not simply facing criticism from a non-member state. It is confronting an effort by the world’s largest economy and most influential financial power to make cooperation with the court materially more difficult.
The United States has never ratified the Rome Statute, the treaty that created the ICC, and Washington has long objected to the possibility that the court could claim jurisdiction over U.S. nationals without American consent. Israel is also not a member. The Trump administration has sharpened that longstanding sovereignty argument by linking it directly to the court’s work involving Israel and to an earlier investigation related to Afghanistan. In July, Secretary of State Marco Rubio announced a campaign to isolate the court and said the administration was prepared to use American leverage aggressively. Since then, pressure has expanded from individual sanctions to discussions of measures that could target the institution as a whole.
For the court’s supporters, the dispute therefore has two layers. The first is political: whether a wave of withdrawals can erode the legitimacy and geographic reach of the Rome Statute system. The second is practical: whether U.S. sanctions can disrupt the technology, banking, insurance, contracting and personnel arrangements that a modern international court requires in order to function. Europe’s response must address both if its declarations of support are to carry operational weight.
Europe closes ranks around the court
European governments responded to Washington’s latest campaign with unusually explicit language. Dutch Prime Minister Rob Jetten, speaking at the General Assembly on September 24, said the court was under attack and urged governments to defend institutions that uphold the international legal order. His intervention carried particular significance because the ICC is headquartered in The Hague, making the Netherlands both host state and a central logistical partner for the institution. The Dutch government’s position is not merely symbolic: any sustained effort to insulate the court from external pressure will depend heavily on practical cooperation in the country where its judges, prosecutors, registry and detention infrastructure operate.
The European Union has also reiterated what it describes as unwavering support for the ICC. Earlier this month, EU foreign policy chief Kaja Kallas condemned U.S. sanctions imposed on ICC President Judge Tomoko Akane and a senior trial lawyer, saying sanctions on court officials undermine the institution’s work. During UN week, Kallas said the bloc has tools available if the pressure becomes more severe and has been trying to rally support beyond Europe. That distinction is important. Brussels does not want the confrontation framed as a narrow transatlantic quarrel in which Europe simply defends a European institution from an American administration. The court’s membership spans Africa, Asia, Latin America and the Pacific, and its supporters argue that its legitimacy depends on presenting accountability for the gravest crimes as a global rather than regional project.
Still, European unity is easier to proclaim than to operationalize. The most consequential options could require governments to expose European banks, insurers, software providers or other companies to competing legal demands from Brussels and Washington. The EU has experience using protective legislation against extraterritorial sanctions, but applying such tools to an international court would raise difficult questions about enforcement, corporate risk appetite and the willingness of private companies to challenge U.S. restrictions when access to the American market and dollar system is at stake.
The sanctions threat goes far beyond travel bans
Reuters reported on September 20 and 21 that the Trump administration had prepared sanctions against the ICC as an organization, although the exact timing of any announcement remained unclear. That would be a substantial escalation from measures aimed at named judges, prosecutors and other officials. Entity-wide sanctions could prohibit U.S. citizens and companies from providing funds, goods or services to the court without authorization from the Treasury Department’s Office of Foreign Assets Control. The direct effect would reach well beyond high-profile officials whose assets or travel can be restricted.
The ICC employs roughly 900 people from about 100 countries, according to Reuters. It buys data-storage and communications services, uses commercial banking channels, obtains insurance, contracts outside investigators and experts, pays salaries, manages witness-protection arrangements and supports field operations in multiple countries. A sanctions regime that made American companies legally unable to provide ordinary services could force the court to replace vendors, restructure payment channels or seek exemptions. Even where exemptions were available, delays and uncertainty could become a form of pressure in their own right.
The broader financial effect could be more severe because major international banks and multinational service providers often respond conservatively to U.S. sanctions risk. A European or Asian company does not need to be formally prohibited from working with the court to decide that the compliance burden is too great. If counterparties fear being cut off from dollar clearing, losing access to U.S. markets or triggering costly investigations, some may simply withdraw. That is why court officials have warned that sanctions can produce a chilling effect that extends beyond the legal text of any American measure.
Why the dollar system gives Washington unusual leverage
The confrontation exposes a structural reality of international institutions: legal independence does not guarantee operational autonomy. The ICC was created by treaty and funded by member states, but it functions within a commercial ecosystem dominated by private banks, cloud providers, technology firms, travel systems and insurers. Many of those companies are connected directly or indirectly to the United States. Even transactions denominated in euros can involve institutions with American exposure, which gives Washington leverage far beyond its formal relationship with the court.
This is the same dynamic that has made U.S. sanctions so powerful in other contexts. The Treasury Department does not need to control every transaction in order to influence behavior. It can make the cost of touching a sanctioned party unpredictable enough that banks and companies choose avoidance. For an institution such as the ICC, which must protect sensitive evidence, maintain secure communications and sustain confidential relationships with witnesses and investigators, sudden service disruption is not merely an inconvenience. It can affect the integrity and tempo of judicial work.
European officials have therefore considered whether an EU blocking mechanism could shield the court and companies that work with it. Such statutes are designed to prevent European entities from automatically complying with foreign sanctions that Brussels considers unlawful. But their effectiveness depends on political backing and on whether companies believe European protection can offset the risk of American penalties. The technical details of any European countermeasure may ultimately matter more than public statements of solidarity.
Naoero’s withdrawal is small in size but large in symbolism
Naoero’s decision gives Washington a concrete diplomatic result, even if the island state is one of the world’s smallest countries. President David Adeang told the General Assembly that his government would formally withdraw from the Rome Statute, arguing that the court had become increasingly irrelevant. U.S. officials welcomed the announcement as an assertion of national sovereignty. In numerical terms, one withdrawal does little to alter a system that counts 125 states parties. Politically, however, the decision gives the Trump administration a visible example to cite as it urges others to follow.
The more important question is whether Naoero becomes the start of a wider chain reaction. Reuters reported that Venezuela and Chad have announced plans to withdraw since Rubio launched his isolation campaign, while Burkina Faso, Mali and Niger announced exits the previous year. Those decisions arise from different domestic and regional calculations, and it would be misleading to describe them all as direct responses to Washington. Yet together they create a narrative that the court’s membership can contract when governments conclude that the political costs of participation outweigh the benefits.
That narrative matters because the ICC has always faced a universality problem. Some of the world’s most powerful states, including the United States, China and Russia, are outside the treaty system. The court’s defenders have argued that expanding membership gradually strengthens a global norm of accountability. A visible period of withdrawals would reverse that psychological direction even if the legal consequences unfold slowly.
Leaving the Rome Statute is not an instant escape hatch
Withdrawal from the ICC is governed by Article 127 of the Rome Statute. A state must notify the United Nations secretary-general, who acts as depositary of the treaty, and the withdrawal normally takes effect one year after that notification is received. The waiting period is designed in part to prevent governments from instantly abandoning obligations when a politically sensitive case emerges. The court has also emphasized in earlier withdrawal disputes that departure does not automatically erase proceedings or matters already under consideration before the withdrawal becomes effective.
That legal architecture means announcements should not be confused with immediate termination of membership. Governments may still face treaty obligations during the notice period, and the court can retain authority over conduct that occurred while the state was bound by the statute, depending on the legal circumstances of the case. The Philippines’ earlier withdrawal provided a prominent example of how a state can leave the treaty without necessarily extinguishing questions about conduct during its membership.
For current states considering departure, the one-year mechanism creates time for domestic debate, diplomatic pressure and possible reversal. It also means that Washington’s effort will be judged not only by the number of leaders who announce withdrawals at international meetings, but by how many governments complete the legal process and sustain the decision in the face of parliamentary, judicial or civil-society scrutiny at home.
The jurisdiction dispute at the center of Washington’s case
The Trump administration’s legal and political argument starts from a basic fact: the United States did not ratify the Rome Statute. Washington maintains that an international court created by a treaty it did not join should not exercise criminal authority over American citizens without U.S. consent. The same objection has been central to American opposition to ICC proceedings involving Israeli nationals, because Israel is also outside the treaty. U.S. officials portray the court’s approach as an infringement on sovereignty and a potential threat to military and political decision-makers in non-member states.
The court and its supporters point to a different principle. Under the Rome Statute, jurisdiction can arise from the territory on which alleged crimes occur, even when the accused is a national of a non-member state, provided the relevant territorial state is a member or has otherwise accepted the court’s jurisdiction. The ICC is also built around complementarity: it is intended to act when national systems are unable or unwilling genuinely to investigate and prosecute crimes within its mandate, rather than to replace functioning domestic courts as a matter of routine.
That clash is not new, but current cases have made it acute. The United States sees the court’s willingness to reach citizens of non-member states as proof of overreach. Supporters counter that allowing nationality alone to shield suspects would create large accountability gaps whenever powerful states refuse to join. Neither position is likely to be reconciled through diplomatic wording. The battle is therefore shifting toward leverage: sanctions, treaty withdrawals, protective legislation and the willingness of member states to enforce court decisions.
Gaza turned a long dispute into an immediate political crisis
The decisive political trigger for the current U.S. campaign has been the ICC’s work related to the Gaza war. In 2024 the court issued arrest warrants for Israeli Prime Minister Benjamin Netanyahu and then-defence minister Yoav Gallant over alleged war crimes and crimes against humanity. Israel rejected the court’s jurisdiction and the allegations, while the United States strongly opposed the warrants. Washington’s subsequent sanctions campaign has been presented in significant part as a defense of Israel and of non-member states from what the administration considers unauthorized prosecution.
For many European governments, the situation is politically uncomfortable because support for the ICC as an institution does not mean agreement with every prosecutorial or judicial decision. Some states have criticized particular aspects of the court’s work or wrestled publicly with what obligations would apply if a wanted official entered their territory. Yet those governments also see a distinction between contesting a legal decision through the court’s procedures and using economic sanctions to impair the institution’s ability to operate.
That distinction is becoming central to Europe’s public case. European officials are trying to defend judicial independence without appearing to pre-judge every case before the court. Their argument is institutional: disagreements over jurisdiction, evidence or warrants should be addressed through legal mechanisms, not by measures that could disable the court’s basic infrastructure. Whether that position can hold across all 27 EU members when confronted with direct U.S. pressure remains an open question.
Ukraine makes the consistency argument impossible to ignore
The dispute is further complicated by the ICC’s role in Ukraine. European governments strongly supported accountability efforts after Russia’s full-scale invasion, and the court issued an arrest warrant for Russian President Vladimir Putin in 2023 over allegations related to the unlawful deportation and transfer of children from occupied areas of Ukraine. Moscow rejected the court’s authority and retaliated against ICC officials. For European capitals, the court’s Ukraine work became part of a broader argument that grave violations should not be insulated by political power.
That history makes selective support difficult. If governments defend the ICC when it acts against Russian officials but abandon it when cases involving Western allies become politically costly, critics can argue that the legal order is being applied unevenly. Conversely, Washington and Israel argue that the court itself has exceeded legitimate limits and cannot claim neutrality merely because it has investigated actors on multiple sides of global conflicts.
The consistency problem does not produce an easy legal answer, but it shapes international credibility. States in Africa, Asia and Latin America have long scrutinized whether international justice institutions hold powerful Western countries and their allies to the same standards applied elsewhere. The present confrontation therefore reaches beyond the specific warrants that triggered it. It asks whether the court can maintain support when its decisions impose political costs on states that otherwise champion international accountability.
Japan’s response widens the dispute beyond Europe
Japan has emerged as an important defender of the court because ICC President Tomoko Akane is Japanese and is already under U.S. sanctions. Tokyo called the measures against her very unfortunate and dispatched an official to The Hague to discuss ways of supporting the court. Prime Minister Sanae Takaichi also used her General Assembly appearance to underscore Japan’s long-standing emphasis on the rule of law in resolving international disputes.
Japan’s stance complicates any attempt to frame the dispute as a clash between Washington and a European legal establishment. Japan is a major U.S. ally in Asia, a country deeply invested in its security relationship with Washington and a significant supporter of multilateral institutions. Its defense of the ICC demonstrates that governments can align closely with the United States strategically while rejecting specific American pressure on an international court.
That matters diplomatically because the ICC’s survival cannot depend on Europe alone. If the court is seen as a European project defended only by EU capitals, its opponents can more easily revive longstanding accusations of geographic imbalance or neo-colonial selectivity. Support from Japan and other non-European members strengthens the argument that the Rome Statute system remains a cross-regional institution even as some governments move toward the exit.
The court enters the fight carrying its own institutional scars
The ICC is confronting external pressure at a moment when it has also been forced to address serious internal problems. In July, its member states voted to dismiss prosecutor Karim Khan following allegations of serious misconduct. Khan denied wrongdoing and said he would challenge the decision. The episode was damaging for an institution whose legitimacy depends heavily on the credibility and independence of its senior officials, but it also demonstrated that the court’s governing system can remove a top official through an internal accountability process.
The dismissal did not cancel existing warrants, because only judges can withdraw judicial orders. Nor did it alter Washington’s campaign. U.S. officials made clear that personnel changes would not end their objections to the court’s jurisdiction. That separation is important: the current confrontation is not fundamentally about the conduct of one prosecutor. It concerns competing claims about the reach of international criminal law and whether a non-member superpower can use economic coercion to restrict a treaty-based institution supported by more than a hundred states.
For the court’s defenders, internal reform is nevertheless essential. Governments asked to spend political capital protecting the ICC from U.S. pressure will expect the institution to show rigorous standards in its own management, prosecutorial decisions and workplace conduct. External attacks can strengthen solidarity, but they do not remove the need for transparency and institutional discipline.
The Global South debate is more complicated than Washington versus Europe
The ICC’s relationship with African and other developing countries has been contentious for years. Critics have argued that the court focused too heavily on African situations in its early history and reflected unequal power structures in which leaders from weaker states faced legal scrutiny while major powers remained beyond reach. Those grievances helped fuel earlier withdrawal threats and continue to shape how governments assess the institution today.
The recent decisions by Burkina Faso, Mali and Niger to announce exits fit partly within that longer critique. Their governments have described the court in terms associated with outside interference and neo-colonial pressure. Washington’s campaign is different in origin but can intersect with those arguments by presenting withdrawal as a defense of sovereignty. That creates an unusual coalition of interests among governments that may otherwise have little geopolitical alignment.
At the same time, many states outside Europe remain committed to the ICC because they see international criminal law as protection for smaller countries rather than a threat to them. For states without great-power military or economic leverage, treaty institutions can offer one of the few mechanisms for pursuing accountability beyond national borders. The contest over the court will therefore be decided as much in capitals across Africa, Asia, Latin America and the Pacific as in Washington, Brussels or The Hague.
What a European blocking response would have to achieve
If the United States proceeds with sanctions against the court itself, Europe will face a practical test that speeches cannot resolve. A credible protective response would need to keep ordinary financial transactions moving, ensure continuity of technology and communications contracts, protect staff from secondary economic pressure and reassure suppliers that working with the ICC will not leave them exposed. It would also need to operate quickly enough to prevent service interruptions from becoming operational crises.
A blocking statute can create legal cover, but it cannot erase commercial risk. A multinational bank may still choose to reduce exposure if the potential cost of losing U.S. access exceeds penalties for non-compliance in Europe. Smaller technology vendors may decide they lack the resources to manage conflicting sanctions regimes. Governments might therefore need to pair legal restrictions with public-sector financial channels, guarantees, procurement support or other mechanisms that reduce the dependence of the court on vulnerable private intermediaries.
Such measures would be politically sensitive because they could turn a dispute over one court into a wider contest over extraterritorial sanctions and financial sovereignty. European policymakers have debated that issue for years in relation to Iran, Cuba and other sanctions regimes. The ICC confrontation could become a new case study in whether Europe can protect an institution it considers strategically important when American financial power points in the opposite direction.
The stakes extend to witnesses, evidence and future investigations
Institutional sanctions are often discussed in abstract terms, but the court’s most sensitive functions depend on continuity. Investigators collect evidence in conflict environments. Lawyers and analysts handle information that can endanger witnesses if compromised. Victims’ representatives communicate with communities that may already distrust international institutions. Secure storage, encrypted communications, specialist travel and protected payment arrangements are not secondary conveniences; they are part of the machinery that makes international criminal cases possible.
Any disruption would not necessarily halt the court overnight. Member states could provide emergency support, alternative banking channels could be developed, and non-U.S. technology suppliers could replace American vendors. But transitions take time, particularly when security accreditation and evidentiary integrity are involved. Replacing a cloud service or financial provider in a sensitive judicial environment is not the same as changing vendors in an ordinary office.
The longer-term risk is deterrence. If outside investigators, consultants, nongovernmental organizations or companies believe that cooperation with the ICC could expose them to sanctions, some may decline future contracts or information-sharing. That could narrow the court’s investigative reach even if its formal legal powers remain intact. The result would be pressure by attrition rather than a dramatic institutional shutdown.
Why membership numbers still matter
The court currently has 125 states parties, according to Reuters and ICC materials. That figure gives the institution a substantial diplomatic base, but raw membership numbers can conceal differences in political commitment. Some states are willing to defend the court publicly, fund it and cooperate with arrests. Others support the Rome Statute in principle while resisting specific investigations, limiting resources or avoiding politically costly enforcement decisions.
Washington’s strategy appears designed to exploit those differences. If only a small number of countries formally withdraw but many more quietly reduce cooperation, the effect on the court could still be significant. Conversely, a strong response by member states could turn the U.S. campaign into a rallying event that reinforces the treaty system. The next several months will show whether governments treat this as a passing disagreement with Washington or as a structural challenge requiring new financial and legal defenses.
The distinction between membership and cooperation is especially important because the ICC has no police force of its own. It depends on states to arrest suspects, transfer defendants, protect witnesses and enforce judicial orders. An institution can retain a large membership on paper while losing effectiveness if governments hesitate to act. Defending the court therefore means more than preventing withdrawals; it means sustaining the practical cooperation that gives its warrants and investigations meaning.
A familiar argument over sovereignty, now backed by much stronger tools
American skepticism toward the ICC predates the current administration. The United States signed the Rome Statute in 2000 under President Bill Clinton but did not ratify it, and subsequent administrations adopted different combinations of opposition, selective cooperation and support for particular investigations. The first Trump administration sanctioned ICC personnel in 2020 over the Afghanistan investigation, demonstrating that Washington was willing to use economic tools against court officials before the current Gaza-related confrontation.
What is different now is the scale and explicit ambition of the campaign. Rubio has described isolation of the court as an objective in itself, and Reuters has reported preparations for sanctions on the entire organization. Trump has urged members to leave, turning a bilateral dispute over jurisdiction into an international recruitment effort against the treaty system. That combination of diplomatic pressure, individual designations and possible entity-wide sanctions gives the current campaign a broader reach than earlier episodes.
The administration’s supporters argue that strong measures are justified because softer objections failed to prevent the court from asserting authority over nationals of non-member states. Critics respond that using financial sanctions to cripple a judicial institution undermines the same rule-of-law principles Washington often invokes elsewhere. The disagreement is unlikely to be resolved by legal theory alone because both sides see the issue as a test of institutional power.
The next decisions will be operational, not rhetorical
Several developments now bear watching. The first is whether the U.S. Treasury formally designates the ICC itself and, if so, how broad the licensing provisions are for humanitarian, legal, financial or administrative transactions. The second is whether the European Union moves from discussion to a concrete protection mechanism. The third is whether additional countries submit formal withdrawal notifications to the United Nations rather than merely announcing political intentions.
Japan’s response will also matter because it can help determine whether support for the court remains visibly cross-regional. So will the position of African, Latin American and Asian member states that have their own criticisms of the ICC but may be wary of setting a precedent in which an outside power can economically disable an international institution. The most consequential diplomacy may occur away from the General Assembly podium, in negotiations over banking, technology, treaty obligations and sanctions compliance.
For the ICC itself, the challenge is to prepare for disruption without appearing politically aligned against the United States. Its legitimacy depends on maintaining the posture of a court rather than a geopolitical actor. That means continuing cases according to judicial procedure, strengthening internal governance after the Khan controversy and ensuring that emergency operational planning does not compromise independence or evidentiary standards.
A broader test of the international legal order
The dispute arrives at a moment when multilateral institutions are already under strain from wars in Europe and the Middle East, rivalry among major powers and growing skepticism toward global governance. The ICC is unusually vulnerable because it deals directly with individual criminal responsibility, including allegations against heads of government and senior military officials. Its work therefore collides with sovereignty more sharply than most international bodies.
That makes the current confrontation larger than the fate of one institution. If a powerful non-member state can make ordinary commercial interaction with a treaty-based court prohibitively risky, other international bodies may draw lessons about their own exposure to financial pressure. If, on the other hand, the court’s members can insulate its operations without triggering an uncontrolled transatlantic confrontation, they will have demonstrated that multilateral institutions can retain practical autonomy even when a major power rejects their authority.
Europe has placed itself at the center of that test. Its leaders have defended the ICC as part of the legal architecture they say underpins international order. The coming phase will reveal whether that commitment extends to the difficult work of keeping payments moving, protecting service providers, sustaining cooperation and absorbing political friction with Washington. Declarations at the United Nations established the principle. The next battle will be over implementation.
For now, Washington has pressure but not a mass exodus
The immediate balance is therefore mixed. Trump has succeeded in making the ICC a prominent issue at the General Assembly and has secured at least one new withdrawal announcement. Other governments have signaled dissatisfaction with the court or moved toward departure. U.S. sanctions on individual officials are already real, and preparations reported by Reuters suggest the administration could escalate further against the institution itself.
But the diplomatic cascade Washington is seeking has not materialized. Europe has rallied publicly behind the court, Japan has defended both the institution and its sanctioned Japanese president, and the Rome Statute still commands a broad membership. The difference between those two realities explains why the next steps matter so much. The ICC is not on the verge of disappearing, but neither can it assume that political support alone will protect it from the financial reach of the United States.
The confrontation now turns on whether the court’s supporters can convert principle into resilience. If they can build payment channels, legal protections and commercial alternatives robust enough to withstand American pressure, the ICC may emerge bruised but operational. If they cannot, Washington may discover that it does not need dozens of treaty withdrawals to weaken the institution. It may be enough to make the ordinary business of international justice harder, slower and more expensive. For a court whose authority has always depended on cooperation, that would be a profound shift.
