Congress passes Iran war powers resolution by June 30?

Platform comparison

Market context

The underlying event is whether the U.S. House and Senate will jointly pass a resolution to restrict military action against Iran by the end of June 2026. This legislative move would formally require congressional approval for hostilities, terminating strikes or deployments without it. The crowd-implied probability sits at 100% YES, reflecting the recent endorsement of similar resolutions by the Republican-led Congress in early June, where the House approved a measure on June 4 and the Senate advanced a parallel one procedurally on May 19[1][3].

Historically, such constraints mirror the 1973 War Powers Resolution enacted after Vietnam, which mandates presidential notification within 48 hours and halts unauthorised action after 60 days unless an emergency exists[1]. Comparable cases include the 2026 Democratic proposal demanding a 30-day end to operations unless Congress authorises force, a clock that began on February 28 when hostilities started[2]. The current 100% probability aligns with the growing bipartisan opposition seen in the House’s 215–208 vote, where several Republicans broke ranks to support the halt[3].

Traders should monitor the Senate’s next procedural vote, expected shortly after the House’s success, and any White House announcements regarding the 30-day deadline for justification[3]. Recent reporting from Reuters confirms the Senate is set to vote again on the resolution to halt the conflict, with GOP senators Lisa Murkowski and others already supporting it[5]. For market accessibility, German GlüStV implications and US CFTC reach define the regulatory landscape, while the ‘no-KYC up to $1,500’ threshold allows traders to access this specific market without identity verification, provided they stay within that limit under current rules.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Legal UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Legal UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Legal UK triggers a quick verification flow that finishes in minutes.