NATO Confirms No Legal Mechanism Exists to Expel Spain Following Pentagon Leak

NATO has officially ruled out any possibility of suspending or expelling Spain from the Alliance, stating that the Washington Treaty contains no legal mechanism for such action, after Reuters reported that an internal Pentagon email had proposed exploring punitive measures against allies who did not support U.S. operations during the war with Iran. A NATO official, speaking to the Spanish newspaper El Mundo, stated the position without ambiguity: the founding treaty "does not contemplate any mechanism for the suspension of a member nor for their expulsion." The clarification came as Spain found itself named in the Pentagon document alongside other allies accused of withholding access rights, bases, and overflight permissions. Spanish Prime Minister Pedro Sánchez, speaking from Nicosia where he was attending a European Council meeting, moved quickly to lower the temperature, dismissing the internal email as irrelevant to official diplomatic relations. The episode has nonetheless generated notable diplomatic friction at a moment of heightened tension between Washington and several European capitals.

Treaty's silence on expulsion leaves Trump with few formal options The NATO spokesperson underlined that the Alliance's founding document provides only for two scenarios regarding membership: the accession of new members and the voluntary withdrawal of an existing one. In more than 75 years of the Alliance's history, no state has ever been expelled, according to reporting by El Confidencial. The Reuters report itself acknowledged the legal ambiguity, noting that the Pentagon email "does not explain how the U.S. could attempt to suspend Spain from the Alliance" and that Reuters "could not immediately determine if any mechanism existed in NATO to do so." Analysts consulted by El Confidencial pointed to a narrower set of practical pressure tools available to Washington outside the treaty framework, including the cancellation of military orders, withdrawal of technological support, exclusion from certain military exercises, or restricted access to U.S.-controlled bases. José Ignacio Torreblanca of the European Council on Foreign Relations noted that the Pentagon document targeted not only Spain but multiple Alliance members, which he said reflected a broader strategic frustration in Washington rather than a specific grievance against Madrid. „If this applies not only to Spain, but to other allies, we are facing a broader signal of concern about how the United States is redefining its relationship with NATO” — José Ignacio Torreblanca via El Confidencial

Sánchez cites 2.1% GDP spending and Eastern Europe deployments Pedro Sánchez, responding to journalists in Nicosia, framed Spain's position as one of full compliance with Alliance obligations and rejected the premise that Madrid had acted as an unreliable partner. He stressed that his government operates on the basis of official documents and formal positions taken by the United States government, not internal emails. Sánchez recalled that Spain has military forces deployed in Eastern Europe to defend the region's territorial integrity against the threat from Russia, and that Spain is also supporting Ukraine through NATO instruments to finance weapons purchases. He pointed to Spain's defense spending as evidence of its commitment, noting that the country had for the first time reached the 2.1 (% of GDP) — Spain's defense spending, reached for the first time in 2026 threshold in the current year. He added that the question of spending levels had already been debated at a previous NATO summit, where a target of 5% of GDP had been proposed and Spain had argued its capability commitments could be met at 2.1%. „We are good NATO allies. Absolute tranquility” — Pedro Sánchez via La Razón

Broader European anxiety over U.S. reliability grows louder The episode has fed a wider European debate about the durability of U.S. commitments to the Alliance at a time when Washington's frustration with allies over the Iran conflict has become increasingly visible. El Periódico noted that Donald Trump has repeatedly used the threat of expulsion as a pressure tool since returning to the White House, applying to international alliances the same logic he applies to personnel decisions within the U.S. administration. The commentary referenced Polish Prime Minister Donald Tusk's call for Europe to guarantee its own security independently of the United States. „If we do not guarantee our security ourselves, no one will do it for us” — Donald Tusk via El Periódico NATO's response was calibrated to contain escalation without directly criticizing Washington: the organization declined to assess U.S. displeasure but drew a clear legal boundary, stating that no member state, regardless of its power, can impose the expulsion of another. The Alliance's architecture, built on consensus rather than hierarchy, means that even indirect political pressure — such as limiting a country's access to positions of responsibility or reducing its weight in the chain of command — represents the outer boundary of what Washington could realistically pursue within the treaty framework.

Spain joined NATO in 1982 under Prime Minister Leopoldo Calvo-Sotero, but membership remained deeply contested domestically. In March 1986, Prime Minister Felipe González held a referendum on continued membership, which he won despite polls predicting defeat — a result that effectively settled the question of Spain's place in the Alliance for subsequent decades. The Washington Treaty, signed on April 4, 1949, established the Alliance on the principle of collective defense under Article 5 and has never been amended to include expulsion or suspension provisions. The debate over defense spending as a share of GDP has been a recurring source of tension between the United States and European allies across multiple U.S. administrations.