# Will Democrats win the 2026 national House popular vote by at least 6 percentage points

> Democrats, ≥2% leads at 95%, runner-up 91% across 8 winner-take-all outcomes — refreshed 56 min ago.

URL: https://simplefunctions.dev/odds/housepopvotemargind
Updated: 2026-09-25T06:20:49.176Z
Category: politics · Topic: election-2026
Status: active
Closes: 2027-02-03

## Headline

- Leader: Democrats, ≥2% at 95%
- Runner-up: Democrats, ≥4% at 91%
- Outcomes: 8 (winner-take-all)
- Venue: Kalshi (8 contracts)
- 24h volume: $0

## Bound contracts (8)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| Democrats, ≥2% | 95¢ | +4pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al2 |
| Democrats, ≥4% | 91¢ | +2pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al4 |
| Democrats, ≥6% | 87¢ | +2pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al6 |
| Democrats, ≥8% | 73¢ | +2pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al8 |
| Democrats, ≥10% | 46¢ | +2pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al10 |
| Democrats, ≥12% | 22¢ | +1pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al12 |
| Democrats, ≥14% | 5¢ | +2pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al14 |
| Democrats, ≥16% | 3¢ | +1pp | $0 | kalshi | /markets/will-democrats-win-the-2026-national-house-popular-kalshi-kxhousepopvotemargind-26nov03-al16 |

## 30-day trajectory

| Day | Democrats, ≥2% | Democrats, ≥4% | Democrats, ≥6% |
|---|---|---|---|
| 2026-09-17 | 86 | — | — |
| 2026-09-18 | — | — | 68 |
| 2026-09-19 | 90 | 86 | 78 |
| 2026-09-24 | 94 | 89 | 85 |
| 2026-09-25 | — | 91 | 87 |

_5 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## What moved the line

- 2026-09-23 · Democrats, ≥10% +13pp 31→44¢ · kalshi
- 2026-09-19 · Democrats, ≥6% +10pp 68→78¢ · kalshi
- 2026-09-24 · Democrats, ≥12% +9pp 12→21¢ · kalshi
- 2026-09-24 · Democrats, ≥6% +7pp 78→85¢ · kalshi
- 2026-09-24 · Democrats, ≥8% +7pp 64→71¢ · kalshi

## Analysis

This probability reflects the likelihood that Democrats will capture more than half of votes cast in the 2026 House elections by a margin exceeding 6 percentage points. The 86% price on the narrower ≥2 point threshold suggests traders view a Democratic popular vote advantage as highly probable, but the sharp decline to 27% on the ≥10 point threshold indicates substantial uncertainty about margin size. Current conditions favoring Democrats—such as historical anti-incumbent patterns and potential dissatisfaction with Republican governance—would need to persist through November 2026 to reach a 6-point margin. Conversely, economic improvement, shifts in voter turnout dynamics, or changes in congressional redistricting effects could narrow Democratic advantages. The election on November 3, 2026, will definitively resolve this question by determining the actual national House popular vote margin.

### Key factors

- Historical anti-incumbent sentiment typically benefits the opposition party in midterm-equivalent cycles; current economic and approval conditions suggest Democratic tailwinds persist
- The gap between ≥2% (86¢) and ≥6% (implied lower) prices indicates traders assign meaningful probability to smaller Democratic margins (2-6 points), constraining the likelihood of larger victories
- Turnout composition and swing-district performance remain uncertain; suburban and youth voting patterns will meaningfully influence final margin
- Redistricting effects from 2020 Census favor Republicans structurally; Democrats must overcome inherent House map disadvantages to achieve 6+ point popular vote margins
- Election scheduled for November 3, 2026, serves as single point of resolution; no interim data releases or events will update popular vote estimates until voting concludes

## 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/housepopvotemargind
- JSON: https://simplefunctions.dev/api/public/odds?slug=housepopvotemargind
- Topic hub: https://simplefunctions.dev/predictions/election-2026

## License

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