# Who will attend the NATO Summit

> Marco Rubio leads at 90%, runner-up 82% across 3 winner-take-all outcomes — refreshed 52 min ago.

URL: https://simplefunctions.dev/odds/who-attend-nato-summit
Updated: 2026-06-08T05:20:08.947Z
Category: geopolitics · Topic: ukraine
Status: active
Closes: 2026-07-08

## Headline

- Leader: Marco Rubio at 90%
- Runner-up: Donald Trump at 82%
- Outcomes: 3 (winner-take-all)
- Venue: Polymarket (3 contracts)
- 24h volume: $28K

## Bound contracts (3)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| Marco Rubio | 90¢ | ±0 | $18K | polymarket | /markets/who-will-attend-the-nato-summit-marco-rubio-polymarket-0xfff846aea9c0528d0e7803a82fc14a2fbede342f862f9a71e59f658ec60e14f3 |
| Donald Trump | 82¢ | −1pp | $9K | polymarket | /markets/who-will-attend-the-nato-summit-donald-trump-polymarket-0x71ee9c148f0e2b386ba959aca5954c5e6c428695bf1a5fca0af9194f40487758 |
| JD Vance | 11¢ | ±0 | $178 | polymarket | /markets/who-will-attend-the-nato-summit-jd-vance-polymarket-0xa46f7716409ea9194c54d014437d572f240f84585504a2078be8e2cf506e0025 |

## 30-day trajectory

| Day | Marco Rubio | Donald Trump | JD Vance |
|---|---|---|---|
| 2026-05-09 | — | 72 | — |
| 2026-05-25 | — | 73 | — |
| 2026-06-01 | — | 69 | — |
| 2026-06-03 | 50 | 86 | 50 |
| 2026-06-04 | 61 | 89 | 26 |
| 2026-06-05 | 87 | 93 | 11 |
| 2026-06-06 | 89 | 97 | 12 |
| 2026-06-08 | 89 | 83 | 12 |

_31 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## What moved the line

- 2026-06-05 · Marco Rubio +26pp 61→87¢ · polymarket
- 2026-06-04 · JD Vance −24pp 50→26¢ · polymarket
- 2026-06-05 · JD Vance −15pp 26→11¢ · polymarket
- 2026-06-07 · Donald Trump −13pp 97→84¢ · polymarket
- 2026-06-04 · Marco Rubio +11pp 50→61¢ · polymarket

## Analysis

This probability reflects market expectations that Donald Trump will attend the 2026 NATO Summit. The 93% price suggests traders view his attendance as highly likely, though not certain. Trump's political position and schedule would primarily drive changes to this probability. Key variables include whether Trump faces scheduling conflicts, domestic political obligations, or health issues that could prevent attendance. The summit date itself will be the primary resolution event—once the NATO Summit occurs and attendance is confirmed or not, this question resolves. Current market depth is modest, with significant volume concentrated in the Trump contract versus alternatives like Marco Rubio (52¢) or JD Vance (18¢), suggesting less active price discovery on who the alternative attendee might be if Trump doesn't participate.

### Key factors

- NATO Summit date and Trump's confirmed calendar commitments at that time
- Whether Trump holds office or campaign position in June 2026 affecting his availability and diplomatic role
- Historical precedent of U.S. leadership attendance at NATO summits and Trump's prior participation patterns
- Volume concentration in Trump contract (93¢) versus alternatives suggests limited market consensus on backup scenarios
- Polymarket contract liquidity and volume trends ($2119 in Trump contract 24h volume) indicating information flow and trader confidence

## Methodology

Headline is the **leader's price**, not an arithmetic mean — averaging disjoint winner-take-all outcomes is meaningless. Per-outcome prices come from the venue's last-traded mid; cross-venue values are simple means across contracts on each venue.

## How to use this data

- HTML: https://simplefunctions.dev/odds/who-attend-nato-summit
- JSON: https://simplefunctions.dev/api/public/odds?slug=who-attend-nato-summit
- Topic hub: https://simplefunctions.dev/predictions/ukraine

## License

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