Trump Bypassed Congress on Iran Strikes, Intensifying Constitutional War Powers Debate

President Donald Trump ordered joint U.S.-Israeli strikes against Iran on February 28 without congressional authorization, describing the campaign as “massive and ongoing” and warning American service members may die in what he explicitly called a “war.”

The operation, dubbed Epic Fury, killed Iranian Supreme Leader Ali Khamenei and is ongoing, with at least four U.S. service members killed and four seriously wounded as of March 2. Trump described the military campaign as “massive and ongoing,” with the U.S. military planning for several days of attacks. The strikes were launched without a congressional declaration of war or authorization for the use of military force, violating what legal scholars say is a clear constitutional requirement.

Constitutional Crisis Over War Powers

The strikes were launched without congressional authorization, though Article 1 of the Constitution gives Congress, not the president, the power to declare war. Constitutional experts say there’s no indication of any circumstance that would give the President unilateral authority to order military action, as presidents’ inherent authority is limited to true emergency circumstances where an attack is underway or an extremely clear imminent attack exists.

Retired Air Force Lt. Col. Rachel VanLandingham, former chief of international law at U.S. Central Command, said the operation “clearly violates the U.S. Constitution and the War Powers Resolution”. Christopher Anders of the ACLU stated Trump “violated the Constitution by invading Iran because the Constitution is crystal clear on who has the authority to declare war and commit American service members to battle and that is Congress alone”.

The White House hasn’t presented a legal justification to the public, and Secretary of State Marco Rubio didn’t give a full accounting of one to members of Congress, according to multiple sources. The Justice Department’s Office of Legal Counsel previously argued that the scale, scope and duration of operations like the Venezuela raid did not rise to the level of war requiring prior congressional authorization, but the extended nature of the Iran campaign makes that argument more difficult to sustain.

Pattern of Unilateral Military Action

The Iran strikes represent the latest in a series of military operations Trump has launched without congressional approval. Trump acted unilaterally when launching June 2025 strikes on Iranian nuclear facilities and for the January ouster of Venezuela’s leader Nicholas Maduro. In November 2025, White House chief of staff Susie Wiles told Vanity Fair that land strikes in Venezuela would require congressional approval, and Trump administration officials privately told members of Congress they lacked legal justification for attacks against land targets in Venezuela. Two months later, Trump launched those exact strikes.

Trump justified not notifying Congress about the raid to capture Nicolás Maduro in Venezuela because leaks might have compromised the operation, according to Axios. Yet lawmakers were kept “in the dark” ahead of major military operations, creating a pattern of circumventing oversight mechanisms designed to prevent unilateral executive warmaking.

Historical Context and Executive Overreach

The Constitution says only Congress can declare war, but Democratic and Republican presidents alike have ordered military force without authorization for more than 75 years. The last time Congress declared war was at the beginning of World War II, and since then, presidents have generally initiated military action using their constitutionally granted powers as commander in chief without an official declaration of war.

The 1973 War Powers Resolution was designed to check this expansion of executive power. Passed over President Richard Nixon’s veto, the resolution required that in the absence of a declaration of war, the president must report to Congress within 48 hours of introducing armed forces into hostilities and must terminate the use of U.S. forces within 60 days unless Congress authorizes continued action. The War Powers Resolution requires the president to consult Congress within 48 hours of a military offensive and cease actions within 60 days if Congress has not voted in support of them.

However, according to CNN, the Justice Department has come up with an increasingly dubious series of arguments to defend such strikes, but virtually all of those arguments have depended on assertions that the strikes were limited and unlikely to lead to a broader conflict. The Iran operation’s scale and stated regime change objective makes those arguments untenable.

Congressional Response and Political Divisions

Efforts in Congress to block President Trump from using further military force against Iran without support from lawmakers have intensified, with lawmakers expected to vote this week on resolutions to require congressional approval. In June 2025, Thomas Massie introduced H.Con.Res. 38 in the House with 84 co-sponsors, while Tim Kaine introduced S.J.Res. 59 and Bernie Sanders introduced the ‘No War Against Iran Act’ (S. 2087) with 7 co-sponsors in the Senate.

The response has split largely along partisan lines, though with notable exceptions. As Trump and officials signaled possible military action against Iran, Massie and Rep. Ro Khanna were teeing up a House vote on a resolution to curb the president’s ability to intervene without approval, with a similar bipartisan measure sponsored by Sen. Tim Kaine and Sen. Rand Paul expected in the Senate.

In the House, Reps. Ro Khanna and Thomas Massie demanded Congress go on record with a public vote, with Khanna saying “Congress must convene on Monday to vote to stop this” and Massie blasting Trump’s “America First” slogan. Sen. Rand Paul said the Constitution gave Congress the power to authorize war “for a reason, to make war less likely,” quoting President James Madison that “the Executive Branch is the branch most prone to war”.

The congressional debate over war powers would mostly be symbolic, as even if a resolution were to pass the narrowly split Congress, Trump likely would veto it and Congress would not have the two-thirds majority needed to overturn that rejection. Trump previously vetoed a war powers resolution on May 6, 2020, stating it mistakenly “implies that the president’s constitutional authority to use military force is limited to defense of the United States and its forces against imminent attack,” with Sen. Kaine warning the veto could enable “endless wars”.

Legal Justifications and International Law

According to The Intercept, the United Nations Charter generally restricts the use of force to cases of self-defense or with approval from the U.N. Security Council, and the Constitution separately gives Congress the power to authorize offensive war. Trump’s actions appear to violate both domestic constitutional requirements and international legal frameworks.

Most modern presidents and their lawyers in the Office of Legal Counsel hold that Article 2 of the Constitution allows the president to use the military in certain situations without prior approval from Congress. Presidents since Franklin D. Roosevelt have successfully circumvented congressional restraints by citing vague concerns like “national security,” “regional security” or the need to “prevent a humanitarian disaster” when launching military operations, while members of Congress never hold presidents accountable by passing legislation restraining them.

From a legal perspective, Operation Epic Fury presents fewer ambiguities than prior strikes, as administrations of both parties have steadily expanded unilateral war powers, effectively redefining what counts as war in constitutional terms and expanding circumstances in which presidents can use force without congressional approval. Air campaigns under Presidents Barack Obama in Libya and Donald Trump in Syria were treated by the executive branch as falling short of war requiring congressional authorization.

Casualties and Strategic Implications

The death toll for Operation Epic Fury is mounting among both civilians and combatants, with a strike on a girls’ primary school resulting in nearly 100 reported civilian casualties. Trump announced “the United States military began major combat operations in Iran,” called the operation “massive and ongoing,” and suggested “the lives of courageous American heroes may be lost and we may have casualties — that often happens in war”.

U.S. casualties heighten the constitutional stakes, because the decision to place American troops in harm’s way has traditionally rested with Congress, which is the government’s closest representation of the American public, according to VanLandingham. Former Air Force special operations member Wes Bryant said the scope of the strikes suggested major combat operations that could quickly tip toward large-scale conflict in a densely populated country, with predictable risks to both U.S. troops and civilians.

Trump’s rhetoric has explicitly called for regime change. Trump said to Iranians, “the hour of your freedom is at hand. When we are finished, take over your government. It will be yours to take”. This open-ended commitment to toppling a sovereign government without congressional debate represents what critics describe as the most extreme example yet of unilateral executive warmaking.

What to Watch

Congress faces votes this week on war powers resolutions that would force Trump to seek authorization or withdraw forces within 60 days. The resolutions face steep odds: passage would require bipartisan majorities in both chambers, and even then Trump would almost certainly veto, requiring a two-thirds override vote that appears mathematically impossible given Republican control.

The practical question is whether the conflict escalates beyond the 60-day War Powers Resolution window, at which point Trump would be constitutionally required to cease operations absent congressional authorization. No president has ever been held legally accountable for violating this provision. The structural question is whether Congress will reassert its constitutional prerogatives or continue decades of acquiescence to executive overreach.

With American casualties mounting and Iran’s military and proxy network capable of sustained resistance, the operation could expand into a prolonged Middle East conflict without defined objectives or exit strategy. Trump’s linking of the operation to domestic political narratives and his administration’s pattern of circumventing legal processes suggest this may be only the beginning of a broader confrontation over the constitutional balance of war powers.