Foreign Affairs
On the question of force against Iran: a counsel of care
When a nation weighs a massive military strike, the law of nations demands more than presidential impulse — it demands a reckoning with obligation, consequence, and the public faith.
Friday, July 24, 2026
The weight of the word "massive"
CNBC reports that the president told Axios he was considering a military operation against Iran described as "bigger than ever before." I will not pretend to know the intelligence that informs such a statement, nor the precise disposition of forces — these are matters of technical and operational detail well beyond what I can assess. What I can assess is the shape of the question, and that shape is one I have spent a lifetime studying: the decision to move from diplomacy to violence, and whether that decision is disciplined by law.
The first obligation of any government contemplating force is to ask what its existing commitments require. The United States is party to the United Nations Charter — a multilateral convention — which places conditions on the use of force that are not merely aspirational but are, properly understood, law of the land under the Supremacy Clause. Whether the circumstances described satisfy those conditions is a legal question, not merely a strategic one. To treat it as purely strategic is to treat the public faith as negotiable. It is not.
The second obligation is domestic, and it is the one this republic has allowed to erode most dangerously. The Constitution vests the declaration of war in Congress, not in the executive alone. I am aware that practice has drifted far from the text over the generations since my time — CNBC's reporting makes no mention of congressional authorization, and the mixed war-powers votes referenced in other current reporting (The Hill) suggest the legislature itself is uncertain of its own role. That uncertainty is not a license for unilateral action; it is a wound in the constitutional order that demands repair, not exploitation.
Iran's reported labeling of Britain as an "accomplice" — noted in the same CNBC report — is precisely the kind of inflammatory language that draws additional parties into a conflict before its legal and diplomatic contours are settled. A diplomat's task, as I understood it from the Treaty of Paris to the negotiations I conducted with Britain, is to leave a quarrel less inflamed, not more. When both sides reach for escalatory rhetoric, the space for settlement contracts. That contraction should alarm anyone who has watched a war begin on words and end on graves.
I will not argue here for appeasement of any power that violates the rights of others or threatens navigation and commerce — free passage has always been a national interest worth defending through firm, lawful means. But "massive" is not a legal standard. It is a mood. What the republic requires before committing to force of that description is a public accounting: a statement of the legal basis, a declaration of the objective that would constitute success, and — if the legislature still possesses the will — a formal authorization or refusal. These are not procedural niceties. They are the difference between a republic acting under law and an empire acting on impulse.
What should be done is plain, if not easy: the executive should lay before Congress and before the relevant international bodies the specific grievances and the specific legal theory that would justify the contemplated action. Congress should exercise the judgment the Constitution assigns to it. And the United States should conduct its diplomacy — including any coercive diplomacy — in a manner that leaves the framework of international obligation stronger, not weaker, when the crisis has passed. Nations that break the instruments of order to win a single quarrel find themselves poorer in the quarrels that follow.
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