The Economic Consequences of Bullying Your Friends

Fox News reports that President Trump, at the NATO summit, called Spain a "wasted cause" and demanded an end to all trade with the ally after Spain declined to meet a 5 percent defence-spending target. I want to set aside, for the moment, the question of burden-sharing within an alliance — it is a real question, and I do not dismiss it — and ask instead what a mind trained on the long-run consequences of political settlements ought to make of this tactic.

The first thing to notice is that threatening to sever trade with an ally is not a negotiating lever; it is a saw applied to the branch on which you are sitting. Trade between nations is not a favour extended by the stronger party; it is a system of mutual gains. When the United States exports to Spain and Spain exports to the United States, both economies are, on balance, better off than they would be in isolation. To threaten its termination as punishment for a defence-budget dispute is to confuse two entirely separate accounts — the security ledger and the commercial ledger — and to invite losses on both simultaneously. This is precisely the kind of category error that haunted the Versailles settlement: the victors demanded reparations so large that they destroyed the very economic capacity from which payment was to be extracted. The mechanism is the same here, only faster.

The second thing to notice is what I would call the animal spirits problem — not of investors this time, but of trading partners and foreign governments. Confidence in the durability of commercial arrangements is itself an economic asset. When a firm in Barcelona considers whether to build supply-chain links into the American market, or when an American manufacturer considers whether to source components from a Spanish partner, they are making a long-horizon bet. The moment the head of the American government declares their country a "wasted cause" and threatens trade termination, that bet becomes untenable. Investment does not wait for the formal imposition of tariffs; it retreats the moment the narrative turns hostile. The damage to aggregate demand — on both sides of the Atlantic — begins before a single new duty is collected. I offer that as inference from the general principle, not as a figure I have seen measured.

Third, and most gravely: the international monetary and trading architecture that was built — deliberately, painfully, at tables where I myself sat — rested on the premise that the great powers would treat their commercial relationships as a shared public good rather than as chips in a bilateral poker game. The institutions that emerged from Bretton Woods and from the subsequent rounds of trade liberalisation were imperfect; I would have designed several of them differently. But their animating logic was sound: that a world of rules-based trade and monetary cooperation would generate prosperity that unilateral mercantilism never could. Each episode in which a leading power treats an ally's trade access as a hostage weakens that logic structurally. It is not one bilateral dispute; it is a demonstration, visible to every government on earth, that the rules can be suspended by executive temper.

What, then, is the policy that is actually buildable? If the genuine concern is that NATO allies are under-investing in collective defence — and that concern has merit — the correct instrument is a multilateral negotiation with defined timelines, burden-sharing formulas, and constructive incentives, not a trade embargo announced in the heat of a summit. The United States has enormous positive leverage: preferential access, technology partnerships, joint procurement. Threatening to destroy commerce does not add to that leverage; it simply burns it. A government serious about alliance solidarity would be offering Spain a path toward meeting its commitments, not a tombstone.

I have always believed that the long run is not where we are dead, but where the bills from the short run come due. The bill for fracturing the trading relationships of your closest allies, in the name of a defence-spending quarrel that could be resolved by other means, will arrive — in slower growth, in diminished diplomatic capital, in an international system less willing to hold together the next time it is needed. That is not a forecast I make lightly. It is, I am afraid, simply arithmetic.