# Iowa Republican Senate Primary Winner

> Liquidity-weighted aggregate at 3% across 1 contract — refreshed 7 h ago.

URL: https://simplefunctions.dev/odds/iowa-republican-senate-primary-winner
Updated: 2026-05-08T20:35:09.189Z
Category: politics · Topic: election-2026
Status: active
Closes: 2026-06-02

## Headline

- Probability: 3% (liquidity-weighted across 1 contract)
- Venue: Polymarket (1 contract)
- 24h volume: $0

## Bound contracts (1)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| Jim Carlin | 3¢ | −1pp | $0 | polymarket | /markets/iowa-republican-senate-primary-winner-jim-carlin-polymarket-0xfbea7ab873fa4c27580ee723155d8a24bcc182d03ef5205065e08ea02951b86e |

## 30-day trajectory

| Day | Aggregate |
|---|---|
| 2026-04-09 | 2 |
| 2026-04-26 | 2 |
| 2026-05-02 | 4 |
| 2026-05-08 | 1 |

_25 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## Analysis

This 37% probability reflects market expectations for the eventual Republican Senate primary winner in Iowa, meaning traders believe there is roughly a one-in-three chance this contract resolves to yes. Iowa's 2026 Senate race will determine which Republican candidate advances to face the general election winner. The primary winner's identity depends on candidate field composition, campaign spending, endorsements, and voter preferences across the state's diverse regions. Key uncertainties include whether establishment-backed candidates consolidate support or a grassroots alternative emerges, and how well-funded campaigns perform in early organizing and advertising. The Iowa caucuses or primary election date will be the definitive resolution event, as this is when voters directly select the Republican nominee. Until that election occurs, the market price reflects accumulated expectations based on candidate viability, polling data if available, and historical patterns of Iowa Republican primary behavior.

### Key factors

- Declared candidate field size and composition—more viable candidates typically dilutes any single candidate's win probability
- Endorsement patterns from Iowa Republican leadership and national party figures, which historically influence Iowa primary voters
- Campaign funding and spending disparities between major candidates, affecting voter reach and persuasion capacity
- Polling performance in Iowa-specific surveys as the primary date approaches, showing actual voter preference trends
- Timing and sequence of candidate entry or withdrawal, which can reshape field dynamics and shift vote consolidation

## 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

- HTML: https://simplefunctions.dev/odds/iowa-republican-senate-primary-winner
- JSON: https://simplefunctions.dev/api/public/odds?slug=iowa-republican-senate-primary-winner
- Topic hub: https://simplefunctions.dev/predictions/election-2026

## License

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