Washington’s 9th District House Race 2026
Washington’s 9th Congressional District, anchored by parts of Seattle, Tacoma, and surrounding suburbs, will hold its general election on November 3, 2026, to fill its U.S. House seat. The district has long leaned Democratic, making the party primary and any emerging challengers central to how the race unfolds. Candidates will compete through Washington’s top-two primary system before advancing to the general ballot.
Why Markets Are Watching
Control of the U.S. House hinges on dozens of competitive and safe-seat races nationwide, and WA-09’s outcome contributes to the overall partisan balance in Congress. Even in a district with a clear partisan lean, primary dynamics, candidate quality, and turnout patterns can shape down-ballot influence and signal broader political trends heading into 2026.
How Prediction Markets Frame the Race
The core question traders face is which party’s nominee ultimately wins the general election, reducing a multi-candidate primary into a binary outcome. This isolates partisan control as the determining variable, setting aside the finer points of candidate biography or local policy debates. Trading activity effectively measures confidence in the district’s historical lean holding steady against any shifts in national sentiment.
Related terms
Total Volume
$98.2k
Kalshi $18.3k · Polymarket $79.9k
Leading Market
Adam Smith
Kalshi 99% · Polymarket 99%
Adam Smith Volume
$75k
Kalshi $14.9k · Polymarket $60.1k
Adam Smith 24h Change
+0.30%
Kalshi +0.30% · Polymarket 0.00%
Calculate Your Potential Return
- Kalshi(opens in a new tab) 7.0% fee
- Polymarket(opens in a new tab) 5.0% fee
| Market | Kalshi Yes | Kalshi Fee | Kalshi Payout | Polymarket Yes | Polymarket Fee | Polymarket Payout |
|---|---|---|---|---|---|---|
| Adam SmithDemocratic Party | 99.0¢ | 7.0% | , trade Adam Smith on Kalshi (opens in a new tab) | 99.0¢ | 5% | , trade Adam Smith on Polymarket (opens in a new tab) |
| Doug BaslerRepublican Party | 2.7¢ | 7.0% | , trade Doug Basler on Kalshi (opens in a new tab) | 3.0¢ | 5% | , trade Doug Basler on Polymarket (opens in a new tab) |
* Estimates if candidate wins. Actual returns may vary.
All Markets
| Market | Total Volume | Kalshi(opens in a new tab) | Polymarket(opens in a new tab) |
|---|---|---|---|
| Adam SmithDemocratic Party | $74,960.21 | ||
| Doug BaslerRepublican Party | $23,194.87 |