Congress passes Iran war powers resolution by June 30?

Platform comparison

Market context

The U.S. Congress is currently navigating a critical legislative push to compel President Trump to end military operations against Iran within thirty days unless formal congressional authorisation is granted. This effort, crystallised in a new War Powers Resolution introduced by Democrats, demands the President halt hostilities, preclude ground troop deployments without explicit authority, and mandate regular briefings to Congress on operational goals. The resolution’s thirty-day clock began on 28 February 2026, coinciding with the start of operations, and explicitly preserves self-defence capabilities while requiring congressional approval for continued engagement.

Historically, similar constraints on presidential war powers have faced steep hurdles, particularly in the Senate where sixty votes are needed to overcome procedural barriers. The House succeeded in passing a comparable resolution on 3 June with a 215–208 vote, marking the first time it has halted the Iran war, yet the Senate’s path remains obstructed, requiring ten additional votes beyond the May 19 support level. Even if both chambers align, the President’s likely veto poses a formidable challenge, as overriding it demands a two-thirds majority in both bodies—a threshold not yet met in this conflict.

Traders should monitor upcoming Senate votes, White House statements on the resolution, and any shifts in Republican opposition to the war. Recent reporting from PBS highlights the considerable difficulty in securing the necessary Senate votes, while the American Legion notes growing Republican dissent against the three-month conflict. On-chain, Polymarket prices this contract at 100% YES, reflecting crowd confidence despite the legislative complexities, with USDC settlements on Polygon conditional tokens locking in outcomes by 30 June 2026.

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Methodology

This page reviews Congress passes Iran war powers resolution by June 30? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Kalshi UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Kalshi 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.

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.