On July 23, 2026, the US House of Representatives voted 214-208 to pass a resolution that limits President Trump's power to wage war against Iran. Four Republicans joined every Democrat in voting yes. It is the first vote of its kind since a ceasefire — a temporary halt in fighting — between the US and Iran fell apart in early July, leading to twelve straight days of fighting. Al Jazeera

The resolution was introduced by Representative Gregory W. Meeks, the top Democrat on the House Foreign Affairs Committee. He has tried several times to pass similar legislation. The Senate passed an earlier version before June 2026, and both chambers had already approved a measure that month urging Trump to get congressional approval before launching further attacks. That June measure was a concurrent resolution, a type of statement Congress can make that does not go to the president and does not have the force of law. It passed the House on a 215-208 vote. Congress.gov; Meeks statement

Congress has tried and failed to force this issue multiple times. Two earlier resolutions, H.Con.Res.38 and H.Con.Res.75, failed on the House floor. Others, including H.Con.Res.40 and a Senate version called S.J.Res.104, both of which would direct the president to pull US troops out of hostilities with Iran unless Congress formally declares war, are still working their way through the process. Congress.gov

The constitutional question at the center of all this is simple. The US Constitution says that only Congress can declare war, and Congress has not done that since World War II. A 1973 law called the War Powers Act requires the president to tell Congress within 48 hours of starting military action. Trump sent Congress that formal notice on July 13, 2026, saying the Iran conflict had resumed. Reuters

The war began on February 28, 2026, when the US and Israel started military operations against Iran. The Trump administration said the fighting had "terminated" after a temporary pause in April. But war powers experts and some members of Congress say that claim does not hold up under the 1973 law, because fighting resumed and has continued without stopping since the ceasefire collapsed in early July. Al Jazeera

About a week before the vote, three US military personnel were killed in an Iranian attack on a base in Jordan, which sharpened the debate in Congress. Representative Pramila Jayapal spoke on the House floor on July 22, urging Congress to take back its war-making authority. Representative John Larson said he is preparing a lawsuit against the administration and writing a new bill to cut off funding for the Iran war. Al Jazeera; Larson

At the same time, Congress has been working on its spending bills. On around July 21, the House approved a $1.15 trillion defense bill that includes tens of billions of additional dollars for the Iran war. So Congress is voting to fund the war while also voting to limit the president's power to wage it. That tension sits at the heart of this conflict between the two branches of government. Al Jazeera

Trump has repeatedly threatened attacks on civilian infrastructure and a possible ground invasion of Iran. The day after the Senate first passed a war powers resolution on Iran in June, Trump attended a Republican Senate luncheon, a sign that the White House is paying attention to Republicans who break ranks. WRAL

In the Senate, Minority Leader Chuck Schumer said Democrats would push for a War Powers vote on the same Thursday the House voted. The Senate has already shown it can pass such a resolution. The key question is whether a joint resolution, which unlike a concurrent resolution does go to the president's desk, can get the two-thirds support in both chambers needed to override a presidential veto. The House's 214-208 vote falls well short of that number. Al Jazeera

Congressman Tom Barrett of Michigan has taken a different approach. He introduced what is called an Authorization for Use of Military Force, or AUMF, a legal document that specifically authorizes military operations. Barrett's version is designed to limit and wind down the conflict in Iran. He also voted to require congressional authorization before further military operations, joining the four Republicans who crossed party lines on the latest House vote. Barrett; Barrett

David Janovsky, acting director of The Constitution Project at the Project On Government Oversight (POGO), called the House vote a reaffirmation of opposition to "an illegal war" and said the conflict is unauthorized. That view reflects a body of legal opinion that the administration's claims of terminated hostilities, followed by resumed fighting without congressional approval, put the White House on shaky constitutional ground no matter how the votes add up. Al Jazeera

The broader picture here is a collision between two branches of government over who gets to decide when America goes to war. The 1973 War Powers Act was itself Congress's response to presidents overstepping their authority during the Vietnam War. Every president since then has treated the law's limits as suggestions rather than rules. Trump's decision to resume fighting, formally notify Congress, and simultaneously claim the earlier conflict had "terminated" puts that ambiguity in sharp relief.

Congress has now voted multiple times to limit the president's war power, yet the spending pipeline keeps funding the very operations those votes aim to restrict. If the Senate follows through on Schumer's promise and sends a joint resolution to the White House, the president would likely veto it, and that would test whether enough lawmakers exist in both chambers to override the veto. Based on the current numbers, they do not.

The real impact may build slowly over time. Each Republican who breaks ranks gives the White House less room to maneuver. And the mix of floor speeches, lawsuits, funding cutoff bills, and AUMF proposals from lawmakers like Barrett and Larson suggests Congress is trying more tactics, even if it still lacks the votes to force the president's hand.