House votes third time to end Iran war as $38bn cost sparks debate

The House of Representatives voted for the third time this year to end the war in Iran, passing a war powers resolution 220-204 on a Tuesday evening in mid-September. The timing was deliberate: the vote came just hours after the Congressional Budget Office released a report documenting the true scale of what the conflict had cost the nation. The numbers were stark. The war had consumed at least $38 billion. The monthly burn rate was climbing by $3 billion. And the nation's stockpile of defensive missiles—Patriot interceptors, Thaad systems, navy air-defense rounds—had been so thoroughly depleted that rebuilding it would take a minimum of five years, even if production was accelerated.

The vote itself followed a familiar pattern. Democrats, joined by a handful of Republicans, called for an end to the fighting. Republican Brian Mast of Florida, who chairs the House foreign affairs committee, countered that Iran remained a genuine threat and questioned which military resources his colleagues would be willing to remove from the region. The resolution, like the two before it in June and July, would almost certainly never reach the president's desk. Trump had made clear he would veto any such measure. The Senate had learned this lesson the hard way in July, when after approving a war powers resolution on its tenth attempt, Republican senators reversed course the very next day following a closed-door lunch with Trump where he berated them over their disloyalty.

The constitutional question underlying the votes was genuine but increasingly abstract. Congress held the power to declare war; the president, as commander in chief, could authorize military actions for a limited time. The War Powers Act, born from the Vietnam era, had tried to formalize this tension by requiring congressional approval for sustained military operations beyond 60 or 90 days. But the mechanism had proven toothless when a president refused to acknowledge its constraints. The House votes were a form of protest, a way for lawmakers to register opposition before heading home to campaign. With fewer than 50 days until the midterm elections, the war and the cost-of-living crisis were expected to damage Republicans at the ballot box. This vote would likely be the last one on Iran before voters went to the polls.

The CBO report that prompted the vote painted a picture of a conflict that had metastasized far beyond its initial scope. Iranian strikes had damaged or destroyed hundreds of buildings and structures at U.S. bases scattered across eight countries: Kuwait, Bahrain, Qatar, the United Arab Emirates, Saudi Arabia, Iraq, Oman, and Jordan. The cost of defending against Iranian ballistic missiles and drones had been extraordinary. The interceptor stockpiles that would be needed in any future conflict with China over Taiwan—where the sheer volume of incoming missiles would dwarf anything the Iran campaign had required—were now critically low. The CBO warned that shortages would be "especially problematic" in such a scenario, given China's expanding arsenal of ballistic and cruise missiles.

The Pentagon's own inspector general had released its first formal review of the war a day before the CBO report. It put munitions spending alone at $22.3 billion through the end of June, with total spending at $33.4 billion. The review noted that the fighting had "resulted in strategic inventory shortfalls and revealed industrial base bottlenecks for munitions resupply." It did not, however, address the Pentagon's internal investigation into the Minab school strike on the war's opening day, which had killed 156 people, including 120 children. Critics had long accused the Pentagon of suppressing the results of that investigation, fearing they would expose negligence in how targeting data had been compiled for the initial strikes.

Beyond the direct military costs, the war had rippled through the broader economy. Disruptions to oil shipments through the Strait of Hormuz had driven up energy prices. Brent crude had jumped from $64 a barrel before the fighting began to $103 at its peak. The CBO calculated that this war-driven inflation would run 0.5 percentage points higher than previously expected by early 2027, with short-term interest rates already about 0.2 points higher than they would otherwise have been. In June, the White House had requested $87.6 billion in supplemental funding, with $67.1 billion earmarked for the Pentagon. Once the CBO stripped out spending it judged unrelated to combat operations—cybersecurity, drone programs, classified initiatives—roughly $42.3 billion of the Pentagon's request appeared tied to the Iran conflict, about 10 percent above the CBO's own estimate. The request included $12.1 billion for classified programs the CBO could not examine, a far larger secret component than in previous war supplementals.

What the CBO could not estimate, it acknowledged, was the cost of repairing the bomb-damaged bases or any future diplomatic and foreign aid expenses tied to the war. Those bills would come later, and they would be substantial. For now, the House had voted. The Senate would not follow. The president would veto if it reached his desk. And the war would continue, month after month, at a cost of $3 billion that the nation would keep paying.