Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket Legal UK Pick polygram.ink |
1% | 99% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Polymarket Legal UK → |
Polymarket polymarket.com |
1% | 99% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Polymarket Legal UK → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Polymarket Legal UK → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Polymarket Legal UK → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Polymarket Legal UK → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Polymarket Legal UK.
Active sub-markets
| June 30, 2026 | 1% YES | 99% NO |
| December 31 | 0% YES | 100% NO |
Market context
A formal declaration of war by the United States Congress against Venezuela would require passage of a joint resolution through both chambers, followed by presidential signature. This is distinct from military authorisation measures (AUMFs) or executive military action, which have been the primary legal instruments for US military engagement since 1942. The last formal declaration of war by Congress occurred in 1942 against Romania, Bulgaria and Hungary; since then, military operations have proceeded under delegated authority or executive order. Venezuela remains under US sanctions and subject to diplomatic tension, but no credible legislative pathway toward a formal war declaration has materialised.
Historical precedent suggests formal declarations are extraordinarily rare in modern US politics. The Korean War, Vietnam War, Gulf Wars, and Afghanistan operations all proceeded without formal declarations, relying instead on AUMFs or executive authority. Congressional appetite for formal war declarations has atrophied substantially; even high-stakes conflicts have bypassed this constitutional mechanism. Venezuela's strategic importance to US interests does not currently match the threshold that would trigger such extraordinary legislative action, and no major political faction has advanced formal declaration rhetoric.
Traders should monitor statements from the House Foreign Affairs Committee and Senate Foreign Relations Committee, as well as any escalation in US–Venezuela military incidents or humanitarian crises that might shift congressional sentiment. Recent reporting from Reuters and the State Department indicates diplomatic channels remain open despite sanctions. The settlement window closes mid-2026, providing eighteen months for material change; the 1% implied probability reflects the structural rarity of formal declarations rather than absence of underlying tensions.
Methodology
We track Will the US officially declare war on Venezuela by 2025? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
FAQ
- 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.
- 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 Polymarket Legal UK?
- Zero. Polymarket Legal UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- 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.
Trade Will the US officially declare war on Venezuela by 2… on Polymarket Legal UK
Live order book, 0% fees, USDC settlement in seconds.
Trade on Polymarket Legal UK →