Congress passes Iran war powers resolution by June 30?

Platform comparison

Market context

The underlying real-world event is the U.S. House of Representatives’ historic approval on 3 June 2026 of a war powers resolution to halt military action against Iran, a move that defied President Trump with 215 votes to 208, including four Republicans joining Democrats[1][5]. Despite this breakthrough, the resolution carries symbolic weight rather than immediate legal force, and the Senate’s path remains obstructed by narrow party-line votes and a requirement for 60 votes to advance, a threshold not yet met after a failed May 19 attempt[2][4].

Historically, comparable cases such as the Senate’s rejection of an Iran war powers resolution in June 2025 illustrate the legislative inertia typical in such conflicts, where public dissent and rising fuel prices following Iran’s closure of the Strait of Hormuz have intensified pressure but not guaranteed passage[4]. The current 100% crowd-implied probability appears detached from these structural hurdles, as repeated Senate attempts to direct withdrawal have stalled on narrow margins, with the most recent failure occurring on 16 June[2].

Traders should monitor the Senate’s upcoming procedural vote on the war powers resolution it advanced last month, alongside any scheduled congressional debates or declarations regarding extended aggression, which the President must present within 30 days of operations beginning on 28 February 2026[3][5]. Key catalysts include potential campaign-finance disclosures from lawmakers opposing the war and any shifts in polling aggregators like PolitiFact, which notes the significant challenge of securing 10 additional votes beyond the May 19 tally[4]. The market leans heavily on the expectation that the Senate will fail to overcome these vote deficits before the 30 June settlement window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Congress passes Iran war powers resolution by June 30? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Trump Prediction routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

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