Should the United States Have Gone to War with Iran?

The Overview

On February 28, 2026, the US and Israel launched a coordinated military operation on Iran, dubbing it Operation Epic Fury and Operation Roaring Lion respectively. The attack consisted of nearly 900 strikes on Iranian military infrastructure, nuclear facilities, and leadership. The strikes resulted in the death of the Iranian Supreme Leader Ali Khamenei, along with dozens of other senior Iranian officials and military commanders. Iran responded within hours with ballistic missiles and drone strikes, hitting Israel and US military bases across the Gulf region.

The proximate cause was reportedly a deadlocked set of nuclear negotiations. Over the early months of 2026, the US and Iran held indirect talks about Iran's nuclear program, with the US demanding a permanent end to all uranium enrichment, while Iran pushed for its right to enrich. On February 27th, Iran had agreed to degrade its enriched uranium stockpiles to the lowest level possible and accept full IAEA verification, according to Oman's foreign minister who was speaking for Iran. President Trump said he was "not thrilled" with the talks, and proceeded with military action.

The Disagreement

While facts bring in all the media reporting, this conflict is first a disagreement about framing.

How the right is framing it

The dominant right-wing and pro-Trump administration framing treats this as a long overdue reckoning with a regime that has waged war with the US as early as 1979. Iran is framed as the "world's leading state sponsor of terrorism," backing groups like Hamas and Hezbollah, resulting in the death of hundreds of Americans through proxies. Now, Iran was close to having enough materials to build a nuclear bomb. Trump is framed as the president who is finally neutralizing the threat, doing what every president since Carter was too scared to do.

How the left is framing it

The dominant left-wing and antiwar framing treats this as an illegal, unilateral war of choice that bypassed Congress and violated international law. There was no congressional authorization, no United Nations approval, and no clear imminent threat from Iran towards the US. Peaceful diplomacy was working: Iran had just offered major concessions, and Trump killed the deal and started a war. Trump is framed as a right-wing extremist Benjamin Netanyahu ally, dragging the US to fight for Israel's conflict.

How international institutions are framing it

The United Nations General Assembly and Secretary-General expressed deep concern. The IAEA's director told CBS News that Iran's nuclear material was still there, in large quantities, despite the US strikes in June 2025. France, Germany, and the United Kingdom all condemned Iran's retaliatory strikes. Canada's Prime Minister largely backs the US effort in halting Iran's nuclear developments. Arab Gulf States, including Qatar, Saudi Arabia, UAE, and Bahrain, warned the US not to strike because they feared Iranian retaliation on their territory — and their fears were later confirmed when Iranian missiles hit their countries.

The Values

Underneath this strike lies a much older disagreement about what the US stands for, what it owes its allies, and when US military force should be called upon. There are values that must be discussed before facts are analyzed.

Value System 1: Preemptive Security and Credible Deterrence

In a world full of nuclear-armed countries, the US has the obligation to prevent hostile states from acquiring nuclear weapons. But deterrence only works if the threat of force is credible. A logical endpoint to "exhaust all diplomacy options" might be a nuclear-armed Iran if the dictatorship never heeds to the agreements. Under this view, the moral urgency is prevention: a nuclear Iran is not a small issue. The cost of acting now, however high, is less than the cost of acting later. Supporters of this view do not fear having a war, but facing the alternative: an Iran with nuclear capabilities.

Value System 2: Constitutional Order, International Law, and the Cost of Unilateralism

Supporters of this view hold to this fact: the mechanisms by which the US declares war matters as much as the outcome of the war. Democracy requires that the decision to put American lives at risk must go through Congress. Under this view, moral urgency is process: the precedent of a president unilaterally starting a major war without congressional or international authorization is far more dangerous than any single adversary, in the long run. A president without democratic backing is a fearful one.

Value System 3: Iranian Civilian Lives and the Ethics of Regime Change

This third value system, often less in mainstream US debate, centers the lives and self-determination of Iranian civilians. The regime massacred thousands of its own citizens in January 2026, but liberation from the outside may cost even more civilian deaths, destroy infrastructure, and create an uncertain power vacuum that may not be liberation at all. The worst-case outcome is not the regime continuing — it is the regime being replaced by chaos or civil war, with Iran's civilians paying the price for a war they did not choose.

The Definitions

"Imminent Threat"

The US legal framework for presidential war-declarations hinges on the concept of "imminent threat." The Trump administration cited this as justification for the strikes, but provided no public evidence that Iran was preparing a specific, near-term attack on the US. The Caroline Doctrine's standard for an imminent threat is: "instant, overwhelming, and leaving no choice of means."

"Nuclear Program" / "Nuclear Threat"

This term, in the media, often conflates two different things: enriching uranium and having a nuclear weapon. When officials said Iran was "a week away" from bomb-grade material, this referred specifically to producing enough enriched uranium, not having a deliverable weapon, which experts estimate would take an additional 1–2 years.

"Diplomacy Was Exhausted"

The Trump administration's stated rationale for the strikes was that it had sought repeatedly to make a deal with Iran, but they rejected every opportunity. But critics point out that the US demanded zero enrichment with no sanctions relief as a starting point, which Iran had consistently said was unacceptable. Iran, a day before the strikes, was making a potential breakthrough, so some critics say that the administration was never seriously interested in compromise.

The Facts

Iran was enriching uranium to 60% purity. Agreed — The IAEA confirmed this. By mid-2025, Iran had enriched approximately 972 pounds of uranium to 60% purity. Weapons-grade is 90%. The enrichment of uranium is non-linear. Going from natural to 60% is very difficult, but the remaining 30% is relatively easier.

Iran's "breakout time" was near zero. Agreed — The "breakout time" refers to the time to produce enough weapons-grade materials for one bomb, not to build the actual weapon.

Iran's JCPOA stockpile restrictions were far exceeded. Agreed — By early 2026, Iran's overall enriched uranium stockpile was more than 40 times the JCPOA-permitted limit.

How close Iran was to an actual nuclear weapon. Contested — There is a significant gap between "breakout time" (days to produce enough material) and "bomb time" (months to years to build a device). The administration collapsed this distinction in public statements.

Effectiveness of the June 2025 strikes. Contested — Trump said the June 2025 strikes obliterated Iran's nuclear capacity. The IAEA's director general said in February 2026 that Iran's nuclear material was still there in large quantities. A preliminary DIA report after the February 2026 strikes assessed that Iran had moved much of its enriched uranium before the strikes. CIA Director Ratcliffe said the damage would take years to rebuild, directly contradicting the DIA.

Whether a diplomatic deal was within reach. Contested — Oman's foreign minister said a "breakthrough" had been reached on February 27. Trump said Iran rejected a proposal for a civilian nuclear program with US investment. US envoy Witkoff said Iran was "boasting" about its ability to build 11 bombs.

What Iran actually had. Unknown — If the DIA report was correct, and Iran had moved most of its enriched uranium before the strikes, the amount of material unaccounted for is unknown.

What comes next in Iran. Unknown — Mojtaba Khamenei has been selected as supreme leader. Trump said the choice is "unacceptable." What happens next for the regime is unknown.

The Forecasts

Every side in this debate carries an implicit theory of how the world works. Here are the competing causal stories, laid out without endorsement. Each depends on assumptions that are contestable.

Model 1: The War Supporters Were Right — The Threat Is Neutralized

The optimistic pro-intervention forecast runs like this: the strikes killed Khamenei and the IRGC leadership, eliminating the decision-making center that was the primary driver of both the nuclear program and the proxy network. This weakens the regime enough for internal protests to collapse the government, and within 2 years, a new government emerges that abandons nuclear ambitions and stabilizes regional security.

Model 2: The Antiwar Critics Were Right — This Becomes a Quagmire

The pessimistic forecast runs like this: the Iranian regime survives the strikes, and the civilian population rallies behind the government, leading to a more stable nuclear direction. The result would be escalating proxy attacks and economic disruption. The US would lose regional influence but would have to continue sending in resources to sustain the war.

Model 3: The Proliferation Cascade — The Broader Nuclear Lesson

This forecast centers on nuclear arsenal: the US demonstrated it will not tolerate enrichment programs in hostile states, setting a precedent that creates pressure on other governments. North Korea has nuclear weapons and is left alone. Gaddafi gave his up, and he died. Other states facing US hostility may now accelerate their own nuclear programs as the only viable deterrent.

Model 4: The Venezuela Model — Limited But Achievable

The final forecast imagines a scenario similar to Venezuela: the US applies overwhelming military and economic pressure, kills key leaders, and then offers compromise to the surviving regime regarding the nuclear program. The regime, weakened and leaderless, accepts terms it previously refused.

The Incentives

Trump administration incentives

Trump began his second term striking Iran's nuclear facilities in June 2025, and claimed that he had "obliterated" Iranian nuclear capacities. However, it became clear that Iran had either moved, or restarted their uranium enrichment program, undermining his earlier claims. Domestic Iranian human rights violations also added incentive for Trump to act. While Obama's signature foreign policy regarding Iran was the JCPOA, Trump replaced it with a maximalist military solution. The War Powers Resolution has never successfully been enforced against a president, making constitutional constraint functionally aspirational.

Israeli (Netanyahu) incentives

Netanyahu has believed for decades that a nuclear Iran is an existential threat to Israel, and had been planning to strike Iran for years. Iran is uniquely weak right now — with a collapsed economy, proxies decimated, protests destabilizing the government, and military degradation from the June strikes. However, another incentive for Netanyahu specifically would be political survival. Netanyahu has been under criminal indictment in Israel for years, but war consolidates political power and creates reasons to delay legal proceedings.

Iranian government incentives

Why did Iran not simply accept Trump's compromise? Because to Iran, it was no compromise. Accepting "zero enrichment" would have been politically catastrophic for any Iranian leader. Enrichment has been framed as a domestic right and a national accomplishment for decades. Iran has also complied with US demands in the past — the JCPOA was a compromise the Iranian government accepted. However, in 2018, the US withdrew from the deal anyway. To the Iranian government, compliance does not produce security, which makes commitment to any deal harder to sustain.

Congressional constraints

Congress has been weakened in war-making decisions for decades, especially after 2001 with the passing of the AUMF, which was interpreted to authorize virtually unlimited presidential war authority. The institutional incentive for Congress as a whole is to avoid going on record. If the war goes well, they are not needed. If the war goes badly, they can criticize the president, claiming never to have authorized it. The Founders' intent was explicitly to make war a deliberate, collective decision, but that design relies on Congress being willing to assert its power.

Media and public opinion constraints

Initial polling showed Americans were skeptical about the decision to wage war. A May 2025 Rasmussen poll found 57% of Americans supported an attack on Iran, but this was before the actual costs of war became visible. Support has since deteriorated, especially without a clear definition of success.

The Persuasion Point

On the nuclear threat justification

Someone who believes that the nuclear threat was real and imminent would update their view if: a comprehensive post-strike assessment confirmed that Iran had moved most of its enriched uranium before the strikes began and the program was set back by mere months. Someone who believes the nuclear threat was exaggerated would update their view if: evidence emerges that Iran had a weapons development program genuinely close to completion. The contested DIA vs CIA assessments about strike effectiveness is the pivot point.

On the diplomatic track

Someone who believes diplomacy was working and was sabotaged would update their view if: evidence surfaced showing that the breakthrough was a negotiation tactic rather than a genuine offer. Someone who believes the Trump administration was never serious about diplomacy would change their view if: evidence emerges that shows the US presented a genuine compromise that Iran flatly rejected.

On the constitutional and legal question

Someone who believes the president has broad inherent authority to launch these preemptive strikes would update their view if: the courts rule that this action exceeded the President's authority, even past the AUMF-granted rights. Someone who believes congressional authorization is non-negotiable would have to grapple with the fact that the 60-day WPR clock has never been enforced in the law's 50-year history, making constitutional constraint functionally aspirational rather than operational.

On the regime change strategy

If in the next 6 months the current regime topples and a transitional government emerges that agrees to binding nuclear constraints, the strikes may have been justified. If instead the regime consolidates under Mojtaba Khamenei, and nuclear developments continue with even more proxy attacks, the critic's model was correct.

The Conclusion

The argument about whether the US should have engaged in this war really decomposes into three different arguments, and no resolution can be offered unless they are separated.

The first is about nuclear deterrence, and how we assess the threats that may occur. For Iran specifically, at what point is their enrichment program an unacceptable risk? This is a difficult question, and reasonable people with access to the same intelligence have reached different conclusions across different administrations.

The second is about the legitimacy of executive war-making. Can the president unilaterally decide to put US service members in harm's way and declare a war without a congressional vote? This is constitutionally clear in one direction but has been practically unenforceable.

The third, and most important one, is a tension in the US identity. The US sees itself simultaneously as a nation bound by international order, but also an exceptional nation that operates outside those rules when its security interests demand it. These two self-conceptions cannot be true at the same time. At a point of crisis, the current administration must choose between them, and the flippant commitment to the choice brings hostility towards the government.

Ultimately, Iran is a symptom of deeper internal problems within the United States. Every generation gets its own version of it, this one just happened to come with missiles.