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Photo of Brandon RikerD
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DemocratRunning for CA-48 U.S. House · 2026

Brandon Riker

The 2026 United States House of Representatives elections in California will be held on November 3, 2026, to elect the 52 U.S. representatives from the State of California, one from each of the state's congressional districts. The elections will coincide with other elections to the House of Representatives, elections to the United States Senate, and various state and local elections. The passage of Proposition 50 in 2025 significantly altered many districts. The primary elections took place on June 2, 2026.
In brief
AI · verified vs data · 2026-07-04

Brandon Riker, a Democrat, is running for California's 48th U.S. House seat in 2026. In current polling, he trails at about 6% compared to his opponent Darrell Issa, who polls at roughly 41%. Polymarket data show approximately 90% win probability. The race is rated safe Republican.

6.3%
Polling average
our aggregate
86%
Win probability
market-implied
Governing & voting record
No legislative record
Roll-call votes and sponsored bills are collected for members of Congress from congress.gov. There is no roll-call source for this office yet.
Where they stand
Key positions not yet compiled
Positions are drawn from the candidate's public record and statements. We haven't compiled a verified set for this candidate yet.
How they vote
No party-unity or ideology scores
Party-unity and DW-NOMINATE ideology scores are only available for candidates with a congressional roll-call record.
Ratings from advocacy groups
No advocacy-group ratings
Interest-group scorecards have no machine-readable feed — they're curated per candidate, and none are on file yet.
Career & history
No career timeline
Career history is built from Wikipedia / Wikidata records. No matching public record was found for this candidate.
Public favorability
No favorability data
This candidate isn't tracked by YouGov's public-figure panel, and no published state polling on their favorability was found.
Donors & money
No campaign finance on file
FEC filings appear here once the candidate's committee reports. Early-cycle and self-funding candidates often have nothing on record yet.
Race

The contest Riker is running in.

CA · HOUSE · 2026safe r
Riker (D) vs Darrell Issa (R)
6.3%−35.1 Issa41.4%
Open full race detail →
Related prediction markets
All markets →

Live contract prices tied to Riker and the seat. Prices are ¢-per-share of the YES outcome; context only, never merged into our polling averages.

Sources & provenance
Biography
Public record
Wikipedia + state records
Markets
Live venues
Polymarket · Kalshi
ALL FIGURES DRAWN FROM PUBLICLY AVAILABLE RECORDS · CANDIDATE PROFILES ARE NONPARTISAN AND CARRY NO ENDORSEMENT. · PHOTO: HENDRIK M. STOOPS LUGO · PUBLIC DOMAIN (WIKIMEDIA COMMONS)
Photo of Brandon RikerD
Democrat · CA-48 U.S. House

Brandon Riker

The 2026 United States House of Representatives elections in California will be held on November 3, 2026, to elect the 52 U.S. representatives from the State of California, one from each of the state's congressional districts. The elections will coincide with other elections to the House of Representatives, elections to the United States Senate, and various state and local elections. The passage of Proposition 50 in 2025 significantly altered many districts. The primary elections took place on June 2, 2026.

Where Riker standsRace →
Riker 6.3%Darrell Issa 41.4%
Market · wins
86¢
6.3%
Poll avg
86%
Win prob
In brief
AI · verified vs data · 2026-07-04

Brandon Riker, a Democrat, is running for California's 48th U.S. House seat in 2026. In current polling, he trails at about 6% compared to his opponent Darrell Issa, who polls at roughly 41%. Polymarket data show approximately 90% win probability. The race is rated safe Republican.

Governing & voting record
No legislative record
Roll-call votes and sponsored bills are collected for members of Congress from congress.gov. There is no roll-call source for this office yet.
Where they stand
Key positions not yet compiled
Positions are drawn from the candidate's public record and statements. We haven't compiled a verified set for this candidate yet.
Career & history
No career timeline
Career history is built from Wikipedia / Wikidata records. No matching public record was found for this candidate.
Public favorability
No favorability data
This candidate isn't tracked by YouGov's public-figure panel, and no published state polling on their favorability was found.
How they vote
No party-unity or ideology scores
Party-unity and DW-NOMINATE ideology scores are only available for candidates with a congressional roll-call record.
Ratings from advocacy groups
No advocacy-group ratings
Interest-group scorecards have no machine-readable feed — they're curated per candidate, and none are on file yet.
Donors & money
No campaign finance on file
FEC filings appear here once the candidate's committee reports. Early-cycle and self-funding candidates often have nothing on record yet.
Race
CA · HOUSE · 2026safe r
Riker (D) vs Darrell Issa (R)
6.3%−35.1 Issa41.4%
Open full race detail →
Related prediction markets
All markets →
Sources & provenance
Biography
Public record
Wikipedia + state records
Markets
Live venues
Polymarket · Kalshi
ALL FIGURES DRAWN FROM PUBLICLY AVAILABLE RECORDS · CANDIDATE PROFILES ARE NONPARTISAN AND CARRY NO ENDORSEMENT. · PHOTO: HENDRIK M. STOOPS LUGO · PUBLIC DOMAIN (WIKIMEDIA COMMONS)