More than 250 US organisations signed a joint letter demanding Congress halt funding for the war, arguing the money is needed for domestic programmes 1. The Coalition's breadth — spanning labour unions, faith communities, civil rights groups, and anti-war organisations — represents the first coordinated domestic mobilisation against the conflict since it began on 28 February.
The letter arrives alongside the CSIS estimate that the US has spent $16.5 billion in 12 days. The administration has not requested supplemental funding from Congress, meaning the war is being financed from existing Pentagon accounts without specific congressional authorisation. During the 2003 Iraq invasion, Congress did not pass its first supplemental appropriation until five weeks after ground operations began — and that vote carried broad bipartisan support. The domestic environment in 2026 is different.
The 250-organisation letter adds a third vector of domestic opposition. Forty-six senators have demanded investigation into the Minab school strike . One hundred and twenty House members have pressed for answers on AI-assisted targeting . This letter shifts the pressure from procedural oversight — how targets are selected, whether AI systems were involved — to the fundamental question of whether the war should be funded at all.
Whether this opposition reaches a legislative threshold depends on what comes next. At 13 dead and $16.5 billion, the numbers have generated organised protest but not congressional action. The Coalition mobilised in a fortnight — the Iraq War opposition took months to consolidate at comparable scale. If casualties or costs climb before the November midterms, members of Congress will face constituent pressure backed by an infrastructure already in place.
