Congress passes Iran war powers resolution by June 30?

Platform comparison

Market context

The underlying event is whether the U.S. Congress will enact legislation forcing President Trump to halt military operations against Iran before the end of June 2026. The House has already passed a resolution with a bipartisan majority of 215–208, urging the President to end hostilities within thirty days unless Congress authorises further force[1][5]. However, the Senate faces a steep hurdle, needing 60 votes to overcome procedural barriers, a threshold it narrowly missed in May with a 50–47 vote[4].

Historically, war powers resolutions in the U.S. rarely succeed without overwhelming bipartisan support or a clear shift in public opinion, as seen in past conflicts where Senate votes failed on party-line divisions[2][4]. The current crowd-implied probability of 100% YES on prediction markets diverges sharply from Polymarket’s 97% probability against passage, reflecting analyst consensus that Senate approval remains unlikely given recent narrow defeats[2]. Traders should monitor the Senate’s next procedural vote, expected soon, and any new announcements from Democratic leadership introducing revised resolutions with stricter ground troop preclusions[3][5]. A recent NPR report confirms the House’s decisive move, but the Senate’s ability to reconcile text differences and secure a presidential signature remains the critical dependency[1][4].

Sources: 1 · 2 · 3 · 4 · 5

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 Best Prediction Markets — 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

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.

What does it cost to trade on Best Prediction Markets?

Zero. Best Prediction Markets routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.