Washington and Brussels are rewriting the rules of their partnership

This week offers an unusually clear window into the future of transatlantic relations.

On one side, EU and US officials continue implementing and refining the Turnberry trade understanding, aimed at easing months of tariff disputes while keeping negotiations alive on issues ranging from digital regulation to industrial goods. On the other, NATO leaders gather in Ankara on 7–8 July against the backdrop of Russia’s continued aggression, growing instability in the Middle East and mounting concerns over Europe’s long-term security.

Taken separately, they are significant diplomatic events. Viewed together, they reveal a broader shift: trade, security and industrial policy are no longer separate tracks of transatlantic cooperation. They have become increasingly intertwined.

From free trade to strategic trade

For much of the post-Cold War era, the transatlantic economic relationship was built on the assumption that deeper integration would naturally strengthen political ties.

That assumption is giving way to a different reality.

The Turnberry process reflects an effort to stabilise relations after years of disputes over tariffs, subsidies and industrial policy. Yet many of the most politically sensitive issues remain unresolved, including digital taxation, critical technologies, steel, automotive exports and regulatory standards.

Rather than eliminating economic competition, both sides are increasingly seeking to manage it.

The objective is less about returning to unrestricted free trade than preventing strategic competition from escalating into open economic confrontation.

Security is now industrial policy

The same logic is shaping NATO.

Defence spending will dominate the headlines in Ankara, particularly discussions around higher spending targets. But behind those figures lies a deeper transformation.

Russia’s invasion of Ukraine has exposed weaknesses not only in military readiness but also in production capacity. Ammunition shortages, supply-chain vulnerabilities and limited defence manufacturing have highlighted that deterrence depends as much on industrial resilience as military capability.

The question facing allies is therefore no longer simply how much they spend, but whether they can produce, procure and sustain the capabilities modern conflict demands.

Trade policy, industrial policy and defence planning are increasingly becoming part of the same strategic conversation.

Europe’s balancing act

The shift also reflects a changing relationship between Washington and Brussels.

The United States continues to press European allies to shoulder a greater share of the continent’s defence burden. At the same time, the European Union is accelerating efforts to strengthen its own defence industrial base, reduce strategic dependencies and improve economic resilience.

That does not signal a weakening of the Alliance. Rather, it reflects a more transactional and strategically complex partnership than the one that characterised much of the past three decades.

The debate is no longer whether Europe should become more capable. It is how greater European autonomy can reinforce NATO while preserving transatlantic cohesion.

Italy as a case study

Italy illustrates the broader adjustment taking place across Europe.

Prime Minister Giorgia Meloni initially invested heavily in cultivating close ties with President Donald Trump, presenting Rome as a bridge between Washington and Brussels. That relationship remains politically important, but recent tensions have underlined the limits of personal diplomacy when trade, industrial policy and security interests diverge.

As more of these issues are negotiated collectively through the European Union, Rome has increasingly sought to strengthen its influence within Brussels while maintaining close ties with Washington.

Italy is hardly alone. Across Europe, governments are recalibrating how they balance national interests, European coordination and the transatlantic alliance.

A partnership, redefined

The Turnberry process and the Ankara summit point to the same conclusion.

The transatlantic relationship is not unravelling, nor is it returning to the assumptions that defined the decades after the Cold War.

Instead, it is adapting to a world in which geopolitical competition increasingly shapes economic policy, industrial strategy and defence planning simultaneously.

That evolution is likely to define the next phase of US-EU relations.

The success of the partnership will depend less on eliminating disagreements than on managing them—finding ways to compete economically while remaining aligned on the strategic challenges posed by Russia, China and an increasingly unstable international order.

In that sense, this week’s events are about more than trade negotiations or alliance diplomacy. They offer an early indication of how the West intends to organise its economic and security partnerships in a far more contested world.