# Republican Presidential Nominee 2028: J.D. Vance

> Liquidity-weighted aggregate at 30% across 1 contract — refreshed 53 min ago.

URL: https://simplefunctions.dev/odds/republican-presidential-nominee-2028-jd-vance
Updated: 2026-06-08T05:20:09.588Z
Category: politics · Topic: election-2026
Status: active
Closes: 2028-11-07

## Headline

- Probability: 30% (liquidity-weighted across 1 contract)
- Venue: Polymarket (1 contract)
- 24h volume: $11K

## Bound contracts (1)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| J.D. Vance | 30¢ | −1pp | $11K | polymarket | /markets/republican-presidential-nominee-2028-jd-vance-polymarket-0x18b1c135d0a40c5894da9412e77311827d9caf16cf4cd6591b247a34730af919 |

## 30-day trajectory

| Day | Aggregate |
|---|---|
| 2026-05-13 | 36 |
| 2026-05-25 | 34 |
| 2026-05-30 | 31 |
| 2026-06-04 | 30 |

_8 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## Analysis

J.D. Vance is currently priced at 39% probability of becoming the Republican presidential nominee in 2028, making him the frontrunner across prediction markets. This reflects his position as Vice President and typical advantages of an incumbent administration's heir apparent, but also genuine uncertainty about whether he will ultimately secure the nomination. The probability reflects tension between his institutional backing and consolidation of Republican support versus potential challenges from other candidates, primary dynamics, or unforeseen political developments over the next 18 months. The nomination will be determined through the 2028 primary season and Republican National Convention, with key early contests in Iowa and New Hampshire likely to clarify frontrunner status significantly. Current market pricing suggests meaningful but not dominant confidence in his nomination prospects.

### Key factors

- J.D. Vance holds the Vice Presidency, which historically provides substantial advantages for securing a party's presidential nomination when an incumbent president is term-limited
- Alternative candidates including Marco Rubio (21¢), Tucker Carlson (7¢), and Donald Trump Jr. (3¢) collectively command 31% probability, indicating fragmentation rather than coalescing support around a single challenger
- Trading volume on the Vance contract ($23,251 in 24h volume) is the second-highest among Republican nominee contracts, suggesting active reassessment and genuine disagreement among market participants
- No scheduled primary elections or major clarifying events occur until late 2027, meaning the probability may shift substantially based on interim political developments, endorsements, or candidate announcements
- The 2-point spread between the Polymarket (39¢) and Kalshi (37¢) contracts on Vance suggests minimal arbitrage opportunity and relatively consistent pricing across venues

## Methodology

Probability is **liquidity-weighted** across all bound Kalshi/Polymarket contracts: Σ(price × volume) ÷ Σ(volume). 30-day trajectory uses the daily mean of intraday 5-min captures. 24h delta = today's mean − yesterday's mean. Movement events are ≥3pp daily moves in the last 7 days.

## How to use this data

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- Topic hub: https://simplefunctions.dev/predictions/election-2026

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