California’s 38th Congressional District: Who Will Win the House Seat?
California’s 38th Congressional District is holding an election for its U.S. House seat in 2026. The district, redrawn under California’s recent redistricting process, will send candidates through the state’s primary system before a general election determines the winner. Party nominations and candidate fields are still taking shape as filing deadlines approach.
Why Markets Are Watching
Control of the House of Representatives often comes down to a handful of competitive districts, and California’s delegation plays an outsized role in that math. The outcome here could shape the partisan balance of power in Congress for the 2027-2028 session. Local demographic shifts and redistricting effects make this race a bellwether for broader statewide trends.
How Prediction Markets Frame the Race
The core question traders are weighing is which party ultimately claims the seat, with separate contracts isolating individual candidates within that outcome. This structure lets participants express views on primary dynamics separately from the general election contest. Because the district’s partisan lean and candidate strength both factor in, the market effectively aggregates expectations about turnout, name recognition, and party coalition strength into a single tradeable view of the race’s trajectory.
Related terms
Total Volume
$29.1k
Kalshi $2.5k · Polymarket $26.6k
Leading Market
Hilda Solis
Kalshi 99% · Polymarket 99%
Hilda Solis Volume
$16.5k
Kalshi $1.3k · Polymarket $15.1k
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 |
|---|---|---|---|---|---|---|
| Hilda SolisDemocratic Party | 99.2¢ | 7.0% | , trade Hilda Solis on Kalshi (opens in a new tab) | 99.0¢ | 5% | , trade Hilda Solis on Polymarket (opens in a new tab) |
| Pedro Antonio CasasRepublican Party | 3.2¢ | 7.0% | , trade Pedro Antonio Casas on Kalshi (opens in a new tab) | — | — | — |
| Pedro CasasRepublican Party | — | — | — | 1.0¢ | 5% | , trade Pedro Casas 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) |
|---|---|---|---|
| Hilda SolisDemocratic Party | $16,466.61 | ||
| Pedro Antonio CasasRepublican Party | $1,107.10 | No market | |
| Pedro CasasRepublican Party | $11,489.02 | No market |