Trump Does Not Own the Iran War. Congress Has a Say, and Democrats Now Have the Leverage

By Yiannis Damellos and Mars Strangelove Jr.

November 6, 2026

The president may command the armed forces, but he does not own America's foreign policy, its war-making authority or the future of a conflict that Congress has never authorized. After the Democratic victory in the midterms, Trump needs to understand that the political ground beneath him has shifted.

Donald Trump should stop talking as though the future of the war with Iran is his personal decision to make. He can threaten, announce military plans, promise escalation or declare that he intends to dictate the terms of an eventual settlement. But there is a constitutional institution in Washington that he cannot simply dismiss: the United States Congress.

And following the November 3 midterm elections, that institution is about to look very different.

Democrats have won control of both the House of Representatives and the Senate, ending two years of Republican dominance on Capitol Hill. The result is more than an electoral rebuke to Trump's presidency. It changes the political balance of power over the administration's most consequential decisions, including the war with Iran.

Trump may be commander in chief, but that title does not give him unlimited authority to commit the United States to an open-ended military conflict. The Constitution gives Congress the power to declare war, authorize military force and control federal spending. A president can order certain military operations under his executive authority, particularly in response to an attack, but expanding a conflict into a sustained war raises questions that cannot be settled by presidential announcements.

And Iran is precisely where those questions have become unavoidable.

Trump launched military operations against Iran alongside Israel on February 28 without first obtaining congressional authorization. The administration subsequently justified its actions through presidential commander-in-chief powers. Yet Congress has repeatedly challenged the administration's approach.

In June, both chambers agreed to a resolution directing Trump to remove American forces from hostilities against Iran unless Congress explicitly authorized the use of military force, while preserving the right to defend the United States and its allies against imminent attacks. The administration nevertheless continued its military operations. The issue has therefore never been simply whether Trump wants to continue the war. It is whether the American constitutional system will allow him to determine its scope and duration without meaningful congressional consent.

The new Congress will have considerably more leverage to challenge that approach.

According to Reuters, Democrats are preparing to use congressional spending powers, legislation, oversight hearings and control over nominations to constrain Trump's foreign policy. They can demand public explanations of the administration's objectives, scrutinize military expenditures and place restrictions on the money available for continued operations.

This is not an abstract constitutional argument. The financial and military costs of the conflict are already substantial. The Congressional Budget Office estimated that US military operations had cost $38 billion by August 1. American taxpayers deserve to know what they are financing, what the military objectives are and, most importantly, what constitutes an acceptable end to the conflict.

Trump cannot simply announce another military campaign and expect Congress to write the cheque.

There is also a political dimension that the president should not underestimate. The midterm elections were a clear rejection of his administration's direction, with voters increasingly frustrated by the economic consequences of the Iran war and his broader policies. Democrats have now been given control of both chambers, and they have every reason to use that authority to demand accountability.

There is, however, a transition period. The newly elected Democratic majorities will not formally take control until January, leaving Trump with the existing Congress during the remainder of the year. Nor does a Democratic majority automatically eliminate presidential executive powers. But the president's political freedom has narrowed, and the prospect of congressional resistance is no longer theoretical.

The message to the White House should be unmistakable: if Trump wants to expand the war, commit additional American forces, pursue a new military objective or seek billions more in funding, he must confront Congress rather than treat it as an audience for his announcements.

And Democrats should make their position equally unmistakable. They should not provide a blank cheque for a war that began without their authorization, without a clearly defined political endgame and without a convincing explanation of how further military action will produce lasting security.

This is not about giving Iran a free hand, nor is it about denying the United States the right to defend its people and its allies. It is about the difference between national security and presidential discretion. American military power is not a personal instrument of the president, and the lives of American service members are not political assets to be committed at will.

Trump should understand that the next chapter of the Iran war cannot be written by presidential declarations alone. The newly elected Congress will have a constitutional responsibility to decide whether the United States continues to finance, authorize or politically support his military ambitions.

He can announce what he intends to do, but he cannot assume that Congress will let him do it.