Donald Trump ordered strikes on sovereign Iranian territory with no Article 51 notification to the UN Security Council and no new AUMF (authorisation for use of military force), the statute Congress would normally pass to sanction a war1. He acted as both chambers moved against him. The House voted 215-208 on 3 June to wind down US involvement, and Senate cloture on a parallel war-powers resolution fell ten votes short. Congress voted to limit the president; the strike order on 9 June bypassed that vote within days of it.
Washington's legal defence rests on Article II self-defence: a president may protect US forces under fire without prior congressional authorisation, and the downed AH-64 Apache supplies the trigger2. Critics will counter that striking radar sites across four locations on Iranian soil exceeds the immediate defence of one aircraft's crew, both of whom had already been recovered. Whether "self-defence" describes the rescue or the retaliation is the hinge on which the whole claim turns.
The self-defence framing matters because it sidesteps the AUMF question entirely. A defensive strike needs no fresh authorisation, so the recovered Apache crew become the legal pivot rather than a vote on the floor. Trump spent 100 days pairing optimistic deal talk with an unsigned MOU; his first instrument of consequence on Iran arrived as ordnance, not a signature. That distinction is the point. An act of war was executed while every document that would normally precede it stayed unsigned, which leaves Congress legislating against a fact already on the ground.
