Spain’s refusal in March 2026 to grant the United States access to the U.S. Naval Station in Rota and the Morón Air Base for strikes against Iran marked a clear act of disloyalty inside the alliance. Madrid not only denied basing and overflight rights but also closed its airspace to American aircraft, forcing the Pentagon to relocate 15 U.S. aircraft.

However, leaked internal documents show Washington is now exploring ways to punish Spain. President Trump has threatened to sever all trade ties. This episode reveals a hard geostrategic truth: the United States cannot expel Spain from the North Atlantic Treaty Organization (NATO), but it possesses powerful tools to contain Madrid’s unreliability and enforce alliance discipline.

The founding treaty of NATO contains no provision for suspending or expelling a member. Only Article 13 allows voluntary withdrawal after a one-year notice. NATO itself confirmed this on April 24, 2026. Spain therefore retains its full membership and the Article 5 collective defense guarantee. Yet its decision to withhold critical support during active combat operations against Iran—while actively aiding the enemy with Western military equipment—undermines the alliance at a dangerous moment.

Geostrategically, Spain’s location is invaluable. The U.S. Naval Station at Rota and the Morón Air Base, positioned near the Strait of Gibraltar, provide the United States with unmatched access to the Mediterranean, North Africa, the Sahel, and the Middle East. These facilities host thousands of American personnel and serve as indispensable logistics hubs for operations across three continents. Rota’s port and airfield sustain naval forces in Europe and Africa, while Morón’s long runways enable rapid deployment of tankers and transports. Spain’s denial forces the United States to reroute assets to Italy and Germany, raising operational costs by 15 to 20 percent and weakening deterrence against Russian, Chinese, and Iranian maneuvering in the region.

Economically, Washington holds decisive leverage. Bilateral trade reached 47 billion dollars in 2025, with the United States enjoying a substantial surplus. Key sectors at risk include packaged medicaments worth 1.3 billion dollars, olive oil at 1.13 billion dollars, and significant machinery and pharmaceutical flows. Indeed, targeted tariffs on these categories would deliver concentrated pain to Spanish exporters with minimal blowback on the American side. Trump’s threat of a complete trade cutoff underscores Washington’s willingness to use economic power to punish free-riding.

Militarily, the basing relationship offers direct leverage. The 2015 Defense Cooperation Agreement can be renegotiated or scaled back. The United States could reduce investments, curtail joint exercises, limit intelligence sharing, and begin a phased drawdown of forces. Such measures would deprive Spain of thousands of local jobs and strip away its status as a frontline NATO partner.

Furthermore, the United States could alter its policy regarding Ceuta and Melilla, support Morocco’s position regarding these two enclaves in North Africa, and even reject the international validity of the recent Gibraltar agreement between the United Kingdom and Spain. Realistically, America could also accelerate alternatives by strengthening and revitalizing its partnership with Portugal, cutting reliance on Spanish territory by 30 percent within 24 months.

Inside NATO, the United States can systematically sideline Spain. Leaked Pentagon communications discuss excluding unreliable allies from prestigious command posts, key committees, and sensitive planning. With its overwhelming financial and military weight in the alliance, Washington can shape outcomes and diminish Spanish influence without violating consensus rules. Public criticism of Spain as an unreliable partner would further isolate Madrid among fellow members and bolster the American punishment measures.

Spain’s own defense record adds context. Although it finally reached 2 percent of gross domestic product in defense spending in 2025, it remains one of the weakest contributors in both capability and willingness.

To respond effectively, the United States must adopt a clear reciprocity doctrine. Every ally should be scored on concrete metrics: defense spending levels, granting of basing and overflight rights, and support during crises. High performers gain priority American funding, technology, intelligence, and command positions. Low performers like Spain face downgraded status, reduced cooperation, and economic consequences.

Moreover, basing agreements should include performance clauses tying 2 to 3 billion dollars in annual American infrastructure support to verified compliance. Failure to deliver would trigger 25 percent tariffs on Spain’s most valuable exports to the United States, particularly pharmaceuticals and automobiles, which together comprise over 40 percent of its vulnerable trade.

This approach is neither speculative nor extreme. It simply demands that geography not shield poor behavior. In an era of great power competition with Russia, China, and Iran, the United States cannot afford unreliable partners on its southern flank.

Spain’s disloyalty is self-inflicted. Washington now has the opportunity to contain it, enforce discipline, and reassert American leadership inside NATO. The Mediterranean map of power will reflect the choices made in the coming months.

© The Times of Israel (Blogs)