WASHINGTON, D.C. — Forty-six Democratic senators sent a letter to Defense Secretary Pete Hegseth on September 11, 2026, demanding a detailed breakdown of the cost of military operations against Iran. The lawmakers criticized the administration’s lack of transparency regarding the financial scope of the conflict that began in February.

The Pentagon requested $67 billion in additional funding for the war through a supplemental budget request. The senators are requesting a breakdown of this $67 billion proposal to understand how the funds would be allocated across various defense needs.

The letter was spearheaded by Sen. Elissa Slotkin of Michigan. The group also seeks an accounting of money spent so far from the roughly $34 billion allocated in the tax and spending bill President Donald Trump signed last year.

Hegseth has briefed the Pentagon press corps eight times since the start of the Iran war in February. The last Pentagon press briefing by Hegseth was in May. The Pentagon’s supplemental request for the $67 billion was seven pages long and included a $1.2 billion request for "administration priorities." "We agree," the senators write in reference to Hegseth's statement that American taxpayers deserve to know where their money goes.

Sen. John Fetterman of Pennsylvania declined to sign the letter. ""I’ve always been at odds with my fellow Democrats over how we hold Iran accountable. I’ll continue to remain an unapologetic supporter of efforts to confront the Iranian regime and its proxies,"" Fetterman said in a statement.

A Congressional Budget Office report issued Tuesday put the cost of the war at $38 billion and concluded that the conflict was driving up inflation for Americans. The Defense Department inspector general issued a report acknowledging a munitions shortage and stating the cost of the conflict was about $33 billion as of June 30, excluding the repair of damaged facilities and other costs.

Why It Matters

The dispute over war costs involves federal expenditures and economic implications for the United States. The Congressional Budget Office identified inflation as a consequence of the conflict, linking military spending to broader economic pressures faced by Americans. The $67 billion supplemental request represents a major increase in defense appropriations that requires congressional approval.

Transparency in wartime spending has historically been a point of contention between the executive branch and Congress. The senators' comparison to the Iraq War shows expectations for regular briefings and detailed financial reporting. The varying cost estimates from the Pentagon, the inspector general, and the Congressional Budget Office illustrate the difficulty in tracking real-time expenditures during ongoing military operations.

Timeline

The Iran war began in February. Defense Secretary Pete Hegseth stated during a Senate Appropriations Committee hearing in late July that the cost of the Iran war so far was $37.5 billion. Hegseth said his $37.5 billion estimate included payroll, operation, maintenance and other anticipated costs through the end of the budget year.

Forty-six Democratic senators sent a letter to Defense Secretary Pete Hegseth demanding a detailed breakdown of the cost of military operations against Iran. "Despite your stated needs, you have repeatedly refused to share basic information that previous administrations, Republican and Democratic, provided to the American public and Congress during times of war," the letter states. "In stark contrast, you have briefed Congress just seven times in that same period and in those appearances, refused to answer basic questions about the objectives and cost of this war," the letter says.

What's New

Pentagon whistleblowers described the Department of Defense under Secretary Pete Hegseth as 'unbelievably chaotic and demoralizing,' with insiders calling him the 'least qualified, most explosive defense secretary in American history.' Republican congressman Thomas Massie proposed impeaching Hegseth, alleging the defense secretary had repeatedly violated the constitution through his handling of the war.