Democrat · CA
Jim Costa
As of October 5, 2026, prediction markets give Jim Costa (Democrat) a 96% chance of winning the 2026 CA-21 House race (Kalshi 95%, Polymarket 97%).
Odds in every market
| Market | Chance | Kalshi | Polymarket | 24h |
|---|---|---|---|---|
| 2026 CA-21 House race | 96% | 95% | 97% | — |
Chance = this candidate's share of each market's prices, averaged across the exchanges that list it.
Campaign money
- Raised
- $1.3M
- Spent
- $609K
- Cash on hand
- $939K
- Outside groups for
- $0
- Outside groups against
- $0
Through June 30, 2026. $528K from individuals, $797K from PACs. FEC filings for Jim Costa →
Running against
Market prices from Kalshi and Polymarket, collected every 10 minutes. Research, not betting advice.
