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CA-04 Primary Winners

icon for CA-04 Primary Winners

CA-04 Primary Winners

$29,688 Vol.

Jun 2, 2026
Polymarket

$29,688 Vol.

Polymarket

Mike Thompson

$7,192 Vol.

98%

Eric Jones

$4,925 Vol.

90%

Heath Fulkerson

$396 Vol.

11%

John Wesley Tyler

$873 Vol.

8%

Trevor Merrell

$9,664 Vol.

7%

Laurie MacKenzie

$710 Vol.

5%

Sharon Brown

$3,402 Vol.

2%

Mandy Ghusar

$2,525 Vol.

1%

The California primary is currently scheduled to take place on June 2, 2026. This market will resolve "Yes" if the listed candidate advances from the primary to contest the seat for California's 4th congressional district in the U.S. House of Representatives in the 2026 midterm elections. Otherwise, this market will resolve to "No". 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.Incumbent Democrat Mike Thompson faces a competitive primary challenge from well-funded Democrat Eric Jones in California's top-two primary for the 4th Congressional District on June 2, 2026, while six Republicans—Sharon Brown, Mandy Ghusar, Jimih Jones, L. John MacKenzie, Raymond Riehle, and Chuck Uribe—along with independent Thomas Roach vie for the second general election advancement spot. In this Solid Democratic district (D+17 Cook PVI), Thompson holds advantages in cash on hand ($2.6 million) and California Democratic Party endorsement, contrasting Jones' higher receipts ($3.2 million) and Our Revolution backing emphasizing progressive policies. Fragmented GOP fundraising limits threats; recent Sacramento Bee voter guide (May 5) and endorsement highlight Thompson's longevity amid Prop 50 redistricting tweaks. Ballots mailed early May, voting centers open May 23.

The California primary is currently scheduled to take place on June 2, 2026.

This market will resolve "Yes" if the listed candidate advances from the primary to contest the seat for California's 4th congressional district in the U.S. House of Representatives in the 2026 midterm elections. Otherwise, this market will resolve to "No".

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.
Volume
$29,688
End Date
Jun 2, 2026
Market Opened
Feb 26, 2026, 5:37 PM ET
The California primary is currently scheduled to take place on June 2, 2026. This market will resolve "Yes" if the listed candidate advances from the primary to contest the seat for California's 4th congressional district in the U.S. House of Representatives in the 2026 midterm elections. Otherwise, this market will resolve to "No". 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.
The California primary is currently scheduled to take place on June 2, 2026. This market will resolve "Yes" if the listed candidate advances from the primary to contest the seat for California's 4th congressional district in the U.S. House of Representatives in the 2026 midterm elections. Otherwise, this market will resolve to "No". 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.Incumbent Democrat Mike Thompson faces a competitive primary challenge from well-funded Democrat Eric Jones in California's top-two primary for the 4th Congressional District on June 2, 2026, while six Republicans—Sharon Brown, Mandy Ghusar, Jimih Jones, L. John MacKenzie, Raymond Riehle, and Chuck Uribe—along with independent Thomas Roach vie for the second general election advancement spot. In this Solid Democratic district (D+17 Cook PVI), Thompson holds advantages in cash on hand ($2.6 million) and California Democratic Party endorsement, contrasting Jones' higher receipts ($3.2 million) and Our Revolution backing emphasizing progressive policies. Fragmented GOP fundraising limits threats; recent Sacramento Bee voter guide (May 5) and endorsement highlight Thompson's longevity amid Prop 50 redistricting tweaks. Ballots mailed early May, voting centers open May 23.

The California primary is currently scheduled to take place on June 2, 2026.

This market will resolve "Yes" if the listed candidate advances from the primary to contest the seat for California's 4th congressional district in the U.S. House of Representatives in the 2026 midterm elections. Otherwise, this market will resolve to "No".

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.
Volume
$29,688
End Date
Jun 2, 2026
Market Opened
Feb 26, 2026, 5:37 PM ET
The California primary is currently scheduled to take place on June 2, 2026. This market will resolve "Yes" if the listed candidate advances from the primary to contest the seat for California's 4th congressional district in the U.S. House of Representatives in the 2026 midterm elections. Otherwise, this market will resolve to "No". 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.

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Frequently Asked Questions

"CA-04 Primary Winners" is a prediction market on Polymarket with 8 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Mike Thompson" at 98%, followed by "Eric Jones" at 90%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 98¢ implies that the market collectively assigns a 98% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "CA-04 Primary Winners" has generated $29.7K in total trading volume since the market launched on Feb 26, 2026. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "CA-04 Primary Winners," browse the 8 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "CA-04 Primary Winners" is "Mike Thompson" at 98%, meaning the market assigns a 98% chance to that outcome. The next closest outcome is "Eric Jones" at 90%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "CA-04 Primary Winners" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.