Explainer-Congress Has Backed Iran War Powers Resolutions. Now What?

## Congress Is Finally Pushing Back on the Iran War — But Can It Actually Stop It?

For the first time since the U.S.-Iran war began on February 28, both chambers of Congress have taken concrete steps to rein in President Donald Trump's authority to continue hostilities. The House passed a war powers resolution on June 4. The Senate advanced a similar measure in a procedural vote on May 19, with a handful of Republicans breaking from party leadership to join nearly every Democrat.

The bipartisan breach is significant. But the question hanging over both resolutions is whether they can actually end a war that has already lasted more than 100 days, cost billions of dollars, and disrupted global oil markets — or whether they are, as the president's allies insist, political theater that will change nothing.

### What the War Powers Resolution Actually Says

The War Powers Resolution, passed in 1973 as a check on presidential power in response to the Vietnam War, requires the president to inform Congress within 48 hours of initiating hostilities and mandates that military action begun without congressional authorization must end within 60 days, unless there is an emergency.

The 60-day deadline for Iran fell on May 1. Trump addressed it by declaring that hostilities had been "terminated" by a ceasefire, despite continued U.S. attacks and a blockade of Iranian ports. Legal experts have said that argument is unlikely to survive judicial scrutiny, but no court has yet been asked to rule on it.

The law also establishes procedures for Congress to vote on war powers resolutions to end unauthorized hostilities. These resolutions are privileged, meaning they can be brought up for votes even without the approval of House or Senate leadership. The Senate has considered seven resolutions and the House four related to the Iran conflict since the war began.

### The Hurdles Ahead

Both resolutions face substantial obstacles, and their path to actually constraining the president is narrow.

The Senate measure has survived only a procedural vote. It has not passed the full chamber. Even if it does, it must also clear the House, where Republican leaders are unlikely to allow a vote on a measure that challenges their own president's war authority.

If it somehow passed both chambers, it would need to overcome a presidential veto — meaning two-thirds majorities in both the House and Senate. That requires significant Republican defections in a party where loyalty to Trump has been a defining feature.

The House measure faces its own procedural wrangling. Senate aides said they are waiting for the parliamentarian to decide whether it qualifies as privileged. If not, Republican Majority Leader John Thune — who rarely breaks with Trump — is not expected to allow a vote.

### Why It Still Matters

Despite these hurdles, the votes carry weight beyond their legislative prospects.

The U.S. Constitution grants Congress — not the president — the sole authority to authorize the use of military force, except for short-term operations or responses to immediate threats. The war powers votes represent the most serious congressional attempt to reclaim that authority in decades.

"The war powers resolution that was passed by the House sends a strong signal to the president that lawmakers across the aisle think that this war has gone on for too long and violates the war powers resolution as well as the Constitution," said Katherine Yon Ebright, a war powers expert at the Brennan Center for Justice at New York University.

Trump appears to be taking the signal seriously. He called the House vote unpatriotic and said Republicans who sided with Democrats should be ashamed of themselves. That reaction itself confirms that congressional pressure is being felt in the White House.

The political stakes are real. Recent Reuters polling showed that only 36% of Americans approve of U.S. strikes on Iran, and just 25% believe the benefits have been worth the costs. The war could affect the November midterm elections that will determine whether Republicans retain control of Congress.

### The Constitutional Precedent

Regardless of whether these specific resolutions become law, they are establishing a precedent. Every war powers vote chips away at the executive branch's de facto monopoly on war-making that has grown since 2001. The Afghanistan and Iraq wars were followed by Libya, Syria, Yemen, and now Iran — all initiated or escalated with minimal congressional input.

The current resolutions, even if vetoed, put members of Congress on record. That record matters for future debates about executive power, for potential legal challenges, and for voters deciding whether their representatives are willing to exercise the constitutional authority they hold.

### What This Means For You

The Iran war has already affected your life, even if you've never thought about war powers. Oil prices are up. Mortgage rates have climbed as inflation expectations have risen. The federal budget that funds this conflict is the same budget that could be paying for infrastructure, healthcare, or tax cuts instead.

Congress is the only branch of government that can legally authorize war. For decades, it has largely outsourced that authority to the president. These resolutions — imperfect, likely to be vetoed, possibly doomed — are a sign that some lawmakers are trying to take that power back.

Whether they succeed depends partly on whether voters care enough to demand it. The Constitution gives Congress the power to declare war. But Congress only uses that power when its constituents force the issue. If you believe the president alone should decide when America goes to war, these resolutions are an overreach. If you believe the Constitution matters, they're overdue.