Did Congress Declare War on Iran? War Powers and the 60-Day Deadline

No. Congress has not declared war on Iran, and it has not passed an Authorization for Use of Military Force covering Iran either. Despite months of large-scale U.S. combat operations that began on February 28, 2026, the war is being waged entirely under President Trump’s asserted authority as commander in chief, making it one of the most significant unilateral uses of American military force without explicit congressional approval.¹

What Legal Authority Is the President Using

The Constitution splits war powers between the branches. Article I, Section 8 gives Congress the power to declare war, raise armies, and fund military operations. Article II makes the president commander in chief.²

In its War Powers Resolution notification to Congress after the June 2025 strikes on Iranian nuclear facilities, the Trump administration cited only the president’s constitutional role “as Commander in Chief and Chief Executive” and his “constitutional authority to conduct United States foreign relations.” It cited no statute.³

The executive branch’s longstanding legal theory holds that the president may use force when an important national interest is at stake and the operation does not rise to “war” in the constitutional sense. The Office of Legal Counsel has defined that threshold as “prolonged and substantial military engagements, typically involving exposure of U.S. military personnel to significant risk over a substantial period.”⁴

No existing AUMF fills the gap. The 2001 AUMF applies to those responsible for the September 11 attacks, not Iran. The 2002 Iraq AUMF was directed at the Iraqi government.⁴

Why a Formal Declaration Is Not the Modern Norm

Congress has formally declared war only 11 times in U.S. history, all before 1943. The last formal declarations came against Bulgaria, Hungary, and Romania on June 5, 1942.⁵ Every major U.S. military engagement since then, including Korea, Vietnam, the Gulf War, Afghanistan, and Iraq, has been conducted either under an AUMF or under asserted presidential authority.⁶

The War Powers Resolution of 1973 was enacted specifically to check unilateral presidential war-making. Presidents of both parties have questioned its constitutionality, and it has rarely been enforced.⁶ President Trump has called it “totally unconstitutional.”⁷

The 60-Day Deadline and the Ceasefire Pause

Under the War Powers Resolution, a president who introduces forces into hostilities must notify Congress within 48 hours and must terminate the use of force within 60 days unless Congress declares war, passes a specific authorization, or extends the deadline. The president may add 30 days only by certifying that military necessity requires it for the safe withdrawal of forces.⁸

The Trump administration submitted its notification on March 2, 2026, setting a 60-day deadline of May 1, 2026. When the date arrived, the administration argued the deadline no longer applied because hostilities had “terminated” with the April 7 ceasefire. Under what commentators called an “intermittent hostilities” theory, the administration asserted that a cessation of fire ends the 60-day clock, and any resumption would simply trigger a new notification and a new clock.⁹

Defense Secretary Pete Hegseth told Congress that “we are in a ceasefire right now, which our understanding means, the 60-day clock pauses or stops.”¹⁰ House Speaker Mike Johnson said Congress did not need to act because the U.S. was “not at war” given the absence of “active, kinetic military bombing.”⁷

Senator Richard Blumenthal disagreed, arguing there is “no pause button in the Constitution, or the War Powers Act,” and pointing to the continuing U.S. naval blockade of Iranian oil tankers as an ongoing act of war. The Senate rejected multiple Democratic attempts to enforce the 60-day requirement before lawmakers left for recess.¹⁰

What Congress Has Actually Voted On

Members of Congress introduced several measures on Iran, but none carried the force of law.

On March 3, 2026, House Democrats led by Representative Josh Gottheimer introduced a War Powers Resolution ordering the president to end military action against Iran within 30 days absent authorization or a declaration of war. It also barred deployment of ground troops without explicit congressional authority.¹¹

On May 7, 2026, Representative Tom Barrett, a Michigan Republican, introduced H.J.Res.176, a proposed AUMF authorizing force to “demolish, degrade, or defeat” Iran’s nuclear weapons program and proxies while prohibiting ground troops, nation-building, or occupation. It included a sunset date of July 30, 2026, and a 30-day wind-down.¹² The bill never advanced beyond introduction.¹³

The most consequential vote came on June 3, 2026, when the House passed a nonbinding concurrent resolution sponsored by Representative Gregory Meeks directing the president to end hostilities. The vote was 215 to 208. Four Republicans crossed over: Thomas Massie of Kentucky, Brian Fitzpatrick of Pennsylvania, Tom Barrett of Michigan, and Warren Davidson of Ohio.¹⁴ On June 23, the Senate adopted the same resolution 50 to 48. Republican senators Rand Paul, Susan Collins, Lisa Murkowski, and Bill Cassidy voted for it; Democrat John Fetterman voted against.¹⁵

Because the measure was a concurrent resolution, it did not require the president’s signature, could not be vetoed, and carried no legal force. It functioned as a symbolic expression of disapproval.¹⁴ The day after the Senate vote, a separate attempt to advance a similar war powers measure failed 47 to 50, after Rand Paul switched to “present” and Bill Cassidy reversed his position.¹⁶

Can the Courts Force the Issue

Almost certainly not. Legal scholars have noted that any lawsuit challenging the president’s Iran operations would likely be dismissed under the “political question” doctrine, as courts have consistently done with prior challenges to presidential war-making.¹⁷ The dispute over whether the U.S. is “at war” with Iran is, in practical terms, a fight between Congress and the president that only Congress can resolve.

The 2020 Precedent

This is not the first time President Trump has clashed with Congress over war powers involving Iran. In 2020, during his first term, the Senate passed S.J.Res.68, a joint resolution directing the removal of U.S. forces from hostilities against Iran after the killing of General Qassem Soleimani. Trump vetoed it on May 6, 2020, calling the measure “unnecessary and dangerous” and arguing the strike was authorized under the 2002 Iraq AUMF and his commander-in-chief authority.¹⁸

The current conflict has extended that pattern. Congress has spoken, in a nonbinding way, against the war. It has not authorized the war. And as of late June 2026, the White House had still not submitted a supplemental funding request to Congress to cover the war’s costs, with defense officials warning of a possible operating-funds shortage over the summer without one.¹⁹

1
Congressional Research Service. The War in Iran
2
National Constitution Center. Declare War Clause
3
Congressional Research Service. War Powers Resolution Notification
4
Just Security. War Powers Trump Iran Strikes
5
United States Senate. Declarations of War
6
U.S. House of Representatives History, Art and Archives. War Powers
7
CBS News. Iran War Powers Resolution 60-Day Deadline
8
Office of the Law Revision Counsel. War Powers Resolution
9
Lawfare. Law and the Iran War After the First 60 Days
10
PBS NewsHour. Trump Says Deadline for Congress to Approve Iran War Doesn’t Apply
11
Office of Rep. Gottheimer. Democrats Introduce New War Powers Resolution
12
Office of Rep. Barrett. Barrett Introduces AUMF to Limit and Wind Down Conflict in Iran
13
GovTrack. H.J.Res. 176: 2026 Authorization for Use of Military Force Against Iran
14
Time. Trump Iran War Powers Resolution House Republicans
15
Roll Call. Senate Joins House in Calling for Stop to US War on Iran
16
CNN. Senate Walks Back Iran War Powers Vote
17
SCOTUSblog. Abandoning the Separation of Powers in Times of War
18
Trump White House Archives. Presidential Veto Message to the Senate on S.J.Res. 68
19
CSIS. War May Be Ending: What Did Epic Fury Cost