Will US withdraw from NATO by 2027?

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Active sub-markets

Market context

The United States formally initiating a withdrawal from NATO or submitting an official notice of denunciation by the end of 2026 is the real-world event this market tracks. Current crowd-implied probability sits at 5% for a "Yes" outcome, reflecting the significant legal hurdles preventing unilateral presidential action.

Historically, no member has ever successfully withdrawn from NATO, and the 1951 Greenland agreement implies continued NATO participation is essential for US access rights [1]. While Article 13 of the North Atlantic Treaty allows withdrawal with just one year's notice, the 2024 National Defense Authorization Act legally bars the President from leaving without a two-thirds Senate majority or congressional approval [2][4]. This statutory barrier, reinforced by recent legislative clarity that no president can withdraw without Congress, frames the low probability as a reflection of constitutional reality rather than mere political sentiment [5].

Traders should monitor announcements regarding US Senate composition, potential shifts in presidential strategy, and any legislative attempts to amend the 2024 Act, as these are the primary catalysts for changing the settlement odds [3]. Recent commentary highlights that while President Trump has suggested leaving NATO due to allies' refusal to patrol the Strait of Hormuz, he remains legally prevented from doing so unilaterally [3][8]. For market accessibility, German GlüStV regulations and US CFTC reach create a complex regulatory environment, yet the "no-KYC up to $1,500" threshold allows retail participants to access this specific market without immediate identity verification, provided they stay within the stipulated limit.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Will US withdraw from NATO by 2027? 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 PolyGram — 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

Is this market available outside the US?

PolyGram 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 PolyGram?

Zero. PolyGram 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.