• Democratic lawmakers are considering using the December 11 government funding deadline as leverage to force President Trump to end the US war with Iran, potentially triggering a federal shutdown.
  • The Pentagon is seeking at least $350 billion in additional funding, though the precise scope of that request remains entangled with a broader $1.5 trillion defense budget proposal.
  • A funding lapse could disrupt federal services and delay compensation, while war-related inflation from disrupted oil shipments continues to strain household budgets.

Congressional Democrats are weighing whether to make restrictions on President Trump’s Iran war a condition of extending government funding beyond December 11, a move that could plunge the federal government into another shutdown, according to people familiar with the matter. Party leaders have not publicly settled their negotiating position, but the outlines of a confrontation are becoming clearer as the year-end deadline approaches.

The current stopgap spending law, enacted in September, funds the government through December 11, setting up an immediate showdown before Democrats take control of both chambers of Congress on January 3. Some Democrats want the next spending bill to prohibit funding for US combat operations in Iran. Others favor a short-term extension that would keep agencies open and move the larger confrontation into January, when their legislative leverage will be greater.

Multiple Pressure Points

Alongside appropriations restrictions, Democrats are considering war-powers legislation and opposition to the annual defense policy bill. Rep. Gregory Meeks has said he will introduce a resolution to end the war on the first day of the next Congress, signaling that the party intends to pursue all three avenues rather than treating them as interchangeable.

The Pentagon, meanwhile, is seeking at least $350 billion in additional funding, according to Bloomberg, a request that is complicating negotiations. That figure is part of the administration’s proposed $1.5 trillion defense package, intended to move through a separate party-line legislative vehicle, rather than a standalone Iran-war supplemental. A separate June administration request sought $87.6 billion in supplemental appropriations, including approximately $67.1 billion for the Defense Department’s conflict-related costs. The two figures describe different requests and should not be added together without checking for overlap.

Trump’s proposed defense budget is increasingly unlikely to pass intact. Democrats are considering a figure closer to $1 trillion, while Republicans face a narrowing window to advance their priorities before losing their majorities. Shares of major defense contractors, including Lockheed Martin (NYSE:LMT) and Northrop Grumman (NYSE:NOC), fell during the election week as expectations for a major spending increase weakened.

Economic and Market Implications

The confrontation combines the economic costs of the war with the potential disruption of a federal shutdown. The Congressional Budget Office has identified reduced oil and natural-gas shipments through the Strait of Hormuz, alongside Red Sea shipping disruptions, as important sources of inflationary pressure. Higher fuel prices reduce household purchasing power and raise business costs, although US energy producers can benefit from stronger demand for exports.

CBO estimated approximately $38 billion in Pentagon operational, logistical and sustainment costs through August 1, 2026—a dated estimate that includes replacement of expended munitions and lost equipment, additional operations and higher fuel costs. A funding lapse could delay federal compensation and purchases, suspend services and reduce private-sector demand. The severity would depend on which agencies lose funding and how long the shutdown lasts.

The political debate extends beyond support for or opposition to the war: it concerns whether disrupting civilian government is an acceptable way to constrain military policy. Antiwar organizations, including Indivisible and the National Iranian American Council, have framed the December vote as an early test of the party’s commitment to ending the conflict. Democratic leaders have not yet resolved that trade-off.

Fragile Prospects

The most consequential next development will be whether Democratic leaders turn individual lawmakers’ proposals into a unified December funding demand—or choose a temporary extension that moves the decisive confrontation into January. Experts consider another stopgap through January or March the likeliest near-term outcome, according to USA TODAY reports. AEI analyst Todd Harrison describes passage of the defense policy bill as a “coin toss,” warning that war-powers restrictions and the confrontation over Defense Secretary Pete Hegseth could derail negotiations.

A funding deadlock remains possible after December 11 if lawmakers and the president cannot agree. Current reporting establishes a political risk, not a reliable numerical probability. The details of any restriction—whether it prohibits combat operations, sets a withdrawal deadline or permits limited protective missions—would produce different outcomes and remain under discussion.

Representatives for the White House and congressional Democratic leaders did not respond to requests for comment.

Clarification: An earlier version of this article misstated the nature of the $350 billion figure. It is part of the proposed $1.5 trillion defense package, not a standalone Iran-war supplemental.