Will the Democratic Party win the CA-21 House seat?
Market price history
Rolling 7-day window of market YES price with the OU fair-price range overlay.
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Market price
YES89¢ (89%)
NO11¢ (11%)
Latest refresh · prices in cents
Polymarket • Volume: $3.3K • Updated 4h agoCloses: 2026-11-03
Polymarket · Politics
OU's Pick
NO at 12¢ · pays 8.7×
Price gap
Polymarket12¢
→OU's fair12¢
Confidence
Low
California's 21st district is currently held by Democrat Jim Costa and remains a strongly Democratic-leaning seat in recent election cycles.
Off market consensus
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