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Live prediction market odds for CA-04 primary advancers?. Compare prices across Kalshi and Polymarket.

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Kalshi / Polymarket

CA-04 primary advancers?

2026-06-02

About This Market

Share

Polymarket and Kalshi are tracking the CA-04 primary advancers ahead of the June 2026 election. As candidates vie for position, shifts in voter sentiment and campaign strategies will influence the odds significantly.

Mike Thompson leads the “CA-04 primary advancers” event at 96.5% implied probability. Other contenders include Eric Jones (91.3%), Heath Fulkerson (7.5%), Mandy Ghusar (6.5%), and Laurie MacKenzie (6.0%). A 8.5% cross-platform spread signals an active arbitrage window.

Price History

Multi-Platform Probabilities
No price history available

Live Markets

2 platforms
MT
Mike ThompsonARB
97% Avg
Kalshi98¢
Polymarket99¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
94.0%90¢98¢2¢10¢
PolymarketPolymarket
99.0%99¢99¢1¢1¢
EJ
Eric Jones
94% Avg
Kalshi97¢
Polymarket96¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
92.0%87¢97¢3¢13¢
PolymarketPolymarket
95.5%95¢96¢4¢5¢
HF
Heath FulkersonARB
8% Avg
Kalshi8¢
Polymarket11¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
4.5%1¢8¢92¢99¢
PolymarketPolymarket
10.5%10¢11¢89¢90¢
MG
Mandy Ghusar
5% Avg
Kalshi8¢
Polymarket7¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
4.5%1¢8¢92¢99¢
PolymarketPolymarket
6.0%5¢7¢93¢95¢
LM
Laurie MacKenzie
5% Avg
Kalshi7¢
Polymarket8¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
4.0%1¢7¢93¢99¢
PolymarketPolymarket
5.0%2¢8¢92¢98¢

Candidate Spotlight

About Mike Thompson

Mike Thompson is the current U.S. Representative for California's 4th Congressional District, serving on the House Committee on Ways and Means. He was re-elected in 2024, securing 66.5% of the vote. His extensive experience and leadership in the district make him a key figure in the upcoming primary.

About Eric Jones

Eric Jones is a Democratic candidate for California's 4th Congressional District in the 2026 elections. He is a business leader and philanthropist who has created thousands of jobs in healthcare and education companies in California. His campaign focuses on affordability, accountability, and restoring the American Dream for working families.

About Heath Fulkerson

Heath Fulkerson is a Republican candidate for California's 4th congressional district in the 2026 U.S. House elections. He has previously run for office in California's 7th congressional district. His candidacy is relevant to this prediction market as he is competing in the upcoming primary for CA-04.

Frequently Asked Questions

What factors influence the odds for CA-04 primary advancers?

Polling data, candidate endorsements, and campaign funding are key factors that impact the odds. Additionally, public debates and voter engagement can shift perceptions and influence market predictions.

How do prediction markets work for elections like CA-04?

Prediction markets allow participants to buy and sell shares based on their expectations of election outcomes. Prices reflect the collective beliefs about which candidates will advance in the primary.

What is the significance of the CA-04 primary?

The CA-04 primary is crucial as it determines which candidates will represent their party in the general election. Outcomes can affect party dynamics and strategies leading up to the election.

What is "CA-04 primary advancers?" and why does it matter?

CA-04 primary advancers is a prediction market event currently tracked across 2 platforms (Kalshi, Polymarket). Mike Thompson leads at 97% implied probability, making it the market favorite. Other contenders include Eric Jones at 91%, Heath Fulkerson at 8%, Mandy Ghusar at 7%.

What is moving the odds on "CA-04 primary advancers?"?

Mike Thompson currently leads at 97% implied probability. Behind Mike Thompson, Eric Jones at 91% and Heath Fulkerson at 8% and Mandy Ghusar at 7% are the next closest contenders. The 8.5% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.

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Resolution Oracles

KalshiKalshi
Attorney General of the United Statesthe Federal Election Commission
PolymarketPolymarket
UMA Optimistic Oraclesos.ca.govConsensus of Sources
Read Full Market Rulebooks
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Market Rulebook: CA-04 primary advancers?

Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.

KalshiKalshi
Primary Rule

If Sharon Brown advances in the 2026 CA-04 primary in 2026, then the market resolves to Yes.

Resolution Oracles
Attorney General of the United Statesthe Federal Election Commission
PolymarketPolymarket
Primary Rule

This market will resolve according to the two candidates who receive the most votes in the primary, regardless of party, to contest the seat for California's 4th congressional district in the U.S. House of Representatives in the 2026 midterm elections. The California primary is scheduled to take place on June 2, 2026. If no nominees are announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official sources, including https://www.sos.ca.gov/. Any replacement of the nominees before election day will not change the resolution of the market.

Resolution Oracles
UMA Optimistic Oraclesos.ca.govConsensus of Sources
Learn more:How to Read Prediction Market PricesCompare Fees Before You TradeNew to Polymarket?

About Mandy Ghusar

Mandy Ghusar is a candidate for the U.S. House of Representatives in California's 4th congressional district, running under the Peace and Freedom Party. She has filed the necessary paperwork to run in the 2026 election. Her candidacy is relevant to this prediction market as she is one of the contenders in the upcoming primary election.

About Laurie MacKenzie

Laurie MacKenzie is a Republican candidate for California's 4th congressional district in the 2026 U.S. House elections. She has filed paperwork with the Federal Election Commission, reporting total receipts of $7,000 and disbursements of $2,780 as of December 31, 2025. Her candidacy is relevant to the CA-04 primary as she seeks to challenge incumbent Democrat Mike Thompson.

About Sharon Brown

Sharon Brown is a Republican candidate for California's 4th Congressional District in the 2026 U.S. House elections. She has filed the necessary paperwork to run for this seat. Her candidacy is relevant to the prediction market concerning potential primary advancers in the CA-04 race.
8.5%
Platforms2
Candidates6
Leader

Mike Thompson

96.5% avg