Short Answer

Both the model and the market overwhelmingly agree that Steve Hilton is most likely to advance in the California Governor primary, with only minor residual uncertainty.

1. Market Behavior & Drivers

This prediction market chart shows a complete lack of price movement. The probability for this contract has remained static at its starting price of 1.0% across all recorded data points. There have been no price spikes, drops, or any discernible trend; the price action is perfectly sideways. Consequently, recent news developments, such as polling shifts among leading candidates like Hilton and Becerra, have had no observable impact on this contract's price.
The most critical feature of this market is the trading volume, which stands at zero. This indicates that no contracts have been bought or sold. The lack of volume suggests there is no market conviction or participation regarding this specific outcome. The 1.0% price is not a reflection of trader consensus but rather an initial or standing offer that has not been engaged with. Because there has been no trading activity, no support or resistance levels have been established. The chart suggests that market sentiment is either non-existent or completely undeveloped for this particular candidate advancing in the primary.
  • Tom Steyer largely self-funded his campaign, raising $143 million by April 2026.
  • California Democratic Party remains uncommitted after its February 2026 convention.
  • Market confidence appears high for Steve Hilton advancing in the primary.
  • Increased 2024 GOP turnout may boost Steve Hilton's primary performance.
  • Heavily self-funded candidates generally experience low success rates nationally.

Who Wins and Why

Outcome Market Model Why
Xavier Becerra 62.0% 51.2% Has federal experience and a strong record in California state politics.
Tom Steyer 56.0% 50.1% A well-known environmentalist and former presidential candidate.
Eric Swalwell 0.4% 0.1% A sitting US Representative from California.
Chad Bianco 10.0% 4.1% Holds a significant law enforcement position as a county sheriff.
Steve Hilton 73.0% 67.7% A recognizable media personality with a political background.

Current Context

Sixty-one candidates are vying for the California Governor primary on June 2, 2026 [1][2]. Current polling averages from RealClearPolitics show Hilton leading with 19.8%, followed closely by Becerra at 18.2%, Steyer at 15.8%, and Bianco at 13.4% [3]. Becerra has recently surged, tying Hilton at 18% in a May 5 California Democratic Party poll, particularly after a prominent exit from the race [4][5]. The percentage of undecided voters in recent polls has decreased to 14%, down from an earlier 24% [4][5].
Key candidates showcase distinct support bases and financial strengths. Hilton has received an endorsement from former President Trump and leads among Republicans with 48% support within that party [4]. Steyer has committed significant financial resources, spending over $145 million on his campaign, and has garnered endorsements from the California Teachers Association and Betty Yee [6][4]. Prediction markets reflect these dynamics, with Hilton having an 82% probability to advance and Steyer at 69% [7].
Sources (7)
  1. 1California Secretary of State Shirley N. Weber, Ph.D., Certifies Candidate List for June 2, 2026, Primary Election:: California Secretary of Statesos.ca.gov
  2. 22026 California gubernatorial electionen.wikipedia.org
  3. 32026 California Governor - Open Primary | RealClearPollingwww1.realclearpolitics.com
  4. 4Poll shows Hilton and Becerra tied in California primary | Sacramento Beesacbee.com
  5. 5California governor race tightens as undecided voters declineyahoo.com
  6. 6Becerra, Steyer jostle for front-runner status in ‘fluid’ California governor’s racethehill.com
  7. 7Who will advance from the California Governor primary? | Live Odds Comparison | Prediction Huntpredictionhunt.com

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Market Data

Contract Snapshot

This market resolves to 'Yes' if Tom Steyer advances to the general election for California governor in 2026, and 'No' if he does not, with the outcome verified by the California Secretary of State. The market opened on November 19, 2025, and will close when the event occurs or by November 3, 2026, at 10:00 am EST. Insider trading by employees of source agencies is prohibited, and the market may close early if the event occurs.

Available Contracts

Market options and current pricing

Outcome bucket Yes (price) No (price) Last trade probability
Steve Hilton $0.73 $0.28 73%
Xavier Becerra $0.62 $0.39 62%
Tom Steyer $0.56 $0.45 56%
Chad Bianco $0.10 $0.91 10%
Katie Porter $0.05 $0.95 5%
Tony Thurmond $0.02 $0.99 4%
Kamala Harris $0.01 $0.99 2%
Eleni Kounalakis $0.01 $1.00 1%
Antonio Villaraigosa $0.01 $0.99 1%
Betty Yee $0.01 $1.00 1%
Ethan Agarwal $0.01 $1.00 1%
Rick Caruso $0.01 $1.00 1%
Rob Bonta $0.01 $1.00 1%
Eric Swalwell $0.01 $1.00 0%
Matt Mahan $0.06 $0.94 6%

Market Discussion

Steve Hilton (R) currently leads polls and markets with 17-18% support and 80-82% advance odds for California's gubernatorial primary, scheduled for June 2, 2026, which advances the top two candidates to the general election [1][2][3][4][5][6]. Xavier Becerra (D) has surged to 18% in a recent Democratic Party poll, joining Tom Steyer (D) (12-14% support, 69% advance odds) and Chad Bianco (R) (14% support, 12-42% advance odds) as significant contenders [3][4][5][6]. The fragmented Democratic field among 61 total candidates reportedly creates a 14-20% risk of two Republicans advancing to the general election [1][2][7].

Sources (7)
  1. 1California gubernatorial election, 2026 - Ballotpediaballotpedia.org
  2. 22026 California gubernatorial electionen.wikipedia.org
  3. 3Becerra, Steyer jostle for front-runner status in ‘fluid’ California governor’s racethehill.com
  4. 4Your guide to the chaotic 2026 California governor’s race | Sacramento Beesacbee.com
  5. 5California governor race: Poll shows sudden surge and tighter contestyoutube.com
  6. 6Who will advance from the California Governor primary? | Live Odds Comparison | Prediction Huntpredictionhunt.com
  7. 72026 California Primaries Odds: Governor Race & House Seatsdefirate.com

4. How do the fundraising strategies and spending patterns of top Democratic contenders Xavier Becerra and Tom Steyer compare for the 2026 primary cycle?

Tom Steyer Total Raised$143 million through April 18, 2026 [1]
Xavier Becerra Total Raised$5.74 million [2]
Steyer Jan-Apr 2026 TV Ad Spending$106 million [3][4][5]
Tom Steyer largely self-funded his 2026 primary campaign, demonstrating immense financial power. Through April 18, 2026, his campaign raised $143 million, predominantly from his own personal contributions [1]. This substantial backing allowed him to spend over $132 million in total [3]. Between January and April 2026, Steyer allocated $106 million, with a significant portion directed toward TV advertisements, which considerably exceeded the spending of his rivals in the California governor race [3][4][5].
Xavier Becerra pursued a traditional fundraising model, raising significantly less capital. His fundraising strategy relied heavily on individual contributions, accumulating approximately $5.74 million in total, with 65% originating from individuals and 25% from other sources [2]. Transparency USA independently reported his total raised at about $5.2 million [6]. Becerra experienced a notable surge in donations after the withdrawal of Swalwell, attracting 20,000 contributions, 97% of which came from first-time donors, contributing $2.89 million during that period [7][8]. His campaign's spending between January and April 2026 amounted to approximately $4.2 million, which represented only 4% of Steyer's expenditures during the identical timeframe [3][4]. Transparency USA indicated his total spending was $1.56 million, and he concluded the January-April period with $507,000 cash on hand [6].
Sources (8)
  1. 12026 California Governor's Race: Where the Money | The Ballot Booktheballotbook.com
  2. 2The Ballot Book | Becerra for Governor 2026 - Campaign Receiptstheballotbook.com
  3. 3Billionaire blitz: Steyer’s $132 million campaign dwarfs rivals in California governor racecapradio.org
  4. 4Steyer’s spending hasn’t led to lead in governor’s race | Sacramento Beesacbee.com
  5. 5Billionaire Tom Steyer outspending governor rivals at furious pacecalmatters.org
  6. 6Becerra for Governor 2026 - California Committee - Transparency USAtransparencyusa.org
  7. 7Becerra gains momentum in California governor's racewashingtonexaminer.com
  8. 8How much money has each 2026 California governor candidate raised?kron4.com

5. Which major statewide endorsements, such as the California Democratic Party and the California Labor Federation, remain uncommitted and what is their timeline for action before June 2026?

California Democratic Party endorsement statusUncommitted for gubernatorial endorsement (February 2026) [1][2][3]
Top votes at CDP conventionSwalwell (24%), Yee (17%), Becerra (14%), Steyer (13%) [1][2]
California Labor Federation endorsementsSteyer, Swalwell, Villaraigosa, Porter (March 16-17, 2026) [4][5]
The California Democratic Party remains uncommitted for the 2026 gubernatorial primary. Following its February 2026 convention, the party did not issue an endorsement for governor due to a lack of consensus among delegates [1]. Top vote recipients at the convention included Swalwell (24%), Yee (17%), Becerra (14%), and Steyer (13%) [1][2]. The CDP's official timeline for an endorsement decision was February 22, 2026, and it has maintained its uncommitted status since then [1][3].
The California Labor Federation has endorsed four candidates for Governor. This organization formally backed Tom Steyer, Eric Swalwell, Antonio Villaraigosa, and Katie Porter for Governor, a decision finalized on March 16-17, 2026, which required a two-thirds supermajority vote [4][5]. As of May 2026, there is no indication of further major endorsements awaiting release, with the primary election scheduled for June 2, 2026 [4][6].
Sources (6)
  1. 1No consensus at California Democratic Party 2026 convention | Sacramento Beesacbee.com
  2. 2https://cadem.org/wp-content/uploads/2026/02/2026-Convention-Endorsing-Conference-Results-FINAL-Results-PDF.pdfcadem.org
  3. 3https://cadem.org/wp-content/uploads/2026/02/Final-RATIFIED-2026-Primary-Election-Consent-Calendar.pdfcadem.org
  4. 4California Federation of Labor Unions Endorse for Governor and Other Statewide Races for 2026 Primary Election  - California Federation of Labor Unionscalaborfed.org
  5. 5California labor federation backs four governor candidates | Sacramento Beesacbee.com
  6. 6SEIU California | SEIU California Makes Dual Endorsement for Governor: Xavier Becerra + Tom Steyerseiuca.org

6. What polling data and key endorsements underpin the market's high confidence in Steve Hilton advancing from the June 2026 primary?

Polymarket Confidence82% (for advancing from primary) [1][2]
UC Berkeley/Politico Poll (March 2026)Hilton 19% [3]
Trump Endorsement DateApril 6, 2026 [4][5]
Market confidence is high for Steve Hilton advancing in the 2026 primary. The market exhibits high confidence in Steve Hilton advancing from the June 2, 2026 primary, with a notable 82% likelihood indicated on Polymarket [1][2]. This strong market sentiment is underpinned by recent polling data showing Hilton's lead and a significant endorsement from Donald Trump [4].
Recent polling data shows varied, yet generally strong support for Hilton. Polling conducted in March and April 2026 reveals fluctuating but often leading positions for Hilton. A UC Berkeley/Politico poll from March 2026 reported Hilton leading with 19%, ahead of Steyer at 13% [3]. An Emerson poll conducted on April 14-15, 2026, also placed Hilton in the lead at 17%, with Bianco and Steyer close behind at 14% [6][7]. Conversely, a SurveyUSA poll on April 14, 2026, indicated Steyer with a slight lead at 21%, followed by Hilton at 18% [8].
Donald Trump's endorsement significantly bolstered Hilton's campaign for governor. A pivotal development supporting Hilton's campaign was the 'COMPLETE & TOTAL ENDORSEMENT' he received from Donald Trump via Truth Social on April 6, 2026 [4][5]. This endorsement positioned Hilton as the GOP front-runner and is considered a significant factor influencing the market's assessment of his viability to successfully advance from the primary [4][5].
Sources (8)
  1. 1Who will advance from the California Governor primary? Pr... 2026 | Polymarketpolymarket.com
  2. 2Who will advance from the California Governor primary? Pr... 2026 | Polymarketpolymarket.com
  3. 3Calif. governor's race poll shows former Fox News host leadingcmf.s.sfgate.com
  4. 4Trump endorses ex-Fox News host Steve Hilton for California govenorsfchronicle.com
  5. 5Trump Endorses Steve Hilton for California Governor, Giving GOP a Front-Runner | KQEDkqed.org
  6. 6Trump-Backed Steve Hilton Is Leading California Governor Polls—Can He Win? - Newsweeknewsweek.com
  7. 7California 2026 Poll: Swalwell Exit from Governor Race Opens Lane for Democrat Xavier Becerra - Emerson Pollingemersoncollegepolling.com
  8. 8Steyer and Hilton lead in new California governor primary polldesertsun.com

7. What is the expected impact of the 2024 presidential election outcome on the 2026 California gubernatorial primary, particularly for Trump-endorsed candidate Steve Hilton?

Trump 2024 CA Vote Share38% [1]
Hilton Polling (April 2026)17% (Emerson) [2]
Hilton Advance Probability77-82% (Polymarket) [3][4][5]
Increased GOP turnout from the 2024 election may boost Hilton. The 2026 California gubernatorial primary is expected to see increased Republican turnout, influenced by the 2024 presidential election where Donald Trump secured 38% of the vote in California [1]. This anticipated rise in turnout could significantly benefit Steve Hilton, who received an endorsement from Donald Trump on April 6, 2026 [6][7][8]. As of April 2026, Hilton's polling data shows him at 17%, placing him at the top of the RealClearPolitics average, which ranges from 16-20% [2][9][10].
Hilton is strongly positioned to advance given favorable polling and market odds. The primary, scheduled for June 2, 2026, operates under a top-two system, meaning the two candidates with the most votes will advance to the general election regardless of party affiliation [11]. Prediction markets indicate a high likelihood of Hilton securing one of these coveted spots, with Polymarket suggesting a 77-82% chance for him to advance [3][4][5]. Furthermore, broader prediction market trends anticipate an 80-81% probability for a Democrat and a Republican to advance from the primary, in contrast to a 9-20% expectation for two Republicans [12][13]. Hilton's consistent polling performance and strong prediction market odds collectively suggest a solid and competitive position in the race [2][9][10][3][4][5].
Sources (13)
  1. 1California’s Flawed Primary System Could Result in the Deep-Blue State Electing a GOP Governor | Truthouttruthout.org
  2. 2RealClearPolitics - Election 2026 - 2026 California Governor - Open Primarywww90.realclearpolitics.com
  3. 3Who will advance from the California Governor primary? Pr... 2026 | Polymarketpolymarket.com
  4. 4Who will advance from the California Governor primary? Pr... 2026 | Polymarketpolymarket.com
  5. 5Who will advance from the California Governor primary? Pr... 2026 | Polymarketpolymarket.com
  6. 6Trump endorses ex-Fox News host Steve Hilton for California govenorsfchronicle.com
  7. 7Trump endorses Steve Hilton in California governor's race - POLITICOpolitico.com
  8. 8Trump endorses Republican Steve Hilton in California governor’s race | CNN Politicscnn.com
  9. 9California 2026 Poll: Swalwell Exit from Governor Race Opens Lane for Democrat Xavier Becerra - Emerson Pollingemersoncollegepolling.com
  10. 102026 Polls: California Governor - 270toWin270towin.com
  11. 112026 California gubernatorial electionen.wikipedia.org
  12. 12Which parties advance from California's 2026 Governor primary?lines.com
  13. 13June 2, 2026: California Governor primary advancers? (Party) Prediction Marketrobinhood.com

8. What does historical election data from California primaries indicate about the success rate of heavily self-funded candidates like Tom Steyer?

National Self-Funded Candidate Win Rate11-12% (2002-2010, 2016-2018) [1][2][3]
Heavily Self-Funded Primary Loss RateOver two-thirds (2016-2018) [3]
Tom Steyer 2020 Presidential Primary Vote Share1.96% (0 delegates, $353 million spent) [4]
Heavily self-funded candidates generally face low success rates nationally. National data indicates self-funders win approximately 11-12% of races [1][2]. Between 2016 and 2018, over two-thirds of candidates who were more than 90% self-funded lost their primaries [3]. The National Institute on Money in State Politics reported an 11% win rate for self-financed candidates from 2002-2010 [1][2].
California gubernatorial primaries offer mixed results for self-funded campaigns. In the 2010 Republican primary, Meg Whitman successfully won her primary after self-funding $144 million and spending $65 per vote [5][6]. However, fellow self-funded candidate Poizner lost despite spending $24 million in the same primary [5][6]. Similarly, in the 1998 Democratic gubernatorial primary, both Checchi, who spent $70 per vote, and Harman, who spent $29 per vote, were unsuccessful [6][7].
Tom Steyer's self-funded campaigns have yielded varied outcomes. His 2020 presidential primary bid in California resulted in only 1.96% of the vote and zero delegates, despite a significant expenditure of $353 million [4]. For the upcoming 2026 California Governor primary, Steyer had already self-funded over $105 million by April and was polling at approximately 11-13% [8][9]. This primary is anticipated to be competitive, with a field including eight Democratic candidates and two leading Republican candidates [10][11].
Sources (11)
  1. 1The Efficacy of Self-Funding a Political Campaign - FollowTheMoney.orgfollowthemoney.org
  2. 2Meg Whitman Smashes Record for Self-Financed Campaign in Californiaabcnews.go.com
  3. 3Self-Funders Continue to Falterfollowthemoney.org
  4. 42020 Presidential Democratic Primary Election Results - Californiauselectionatlas.org
  5. 5The (Mostly) Unchanged Efficacy of Self-Funding a Political Campaign - FollowTheMoney.orgfollowthemoney.org
  6. 6https://www.fppc.ca.gov/content/dam/fppc/documents/Education-External-Division/Breaking_the_Bank.pdffppc.ca.gov
  7. 7EPIC JOURNEY: CA: A Very Expensive Primary Winepicjourney2008.com
  8. 8Heavy spending fails to produce breakout in CA governor race | Sacramento Beesacbee.com
  9. 9Billionaire Tom Steyer outspending governor rivals at furious pacecalmatters.org
  10. 10The field is set: Meet the candidates officially running for California governorcapradio.org
  11. 112026 California gubernatorial electionen.wikipedia.org

9. What Could Change the Odds

Key Catalysts

The California gubernatorial primary election, scheduled for June 2, 2026, will see the top-two candidates advance to November 3 [1][2]. Ballots were mailed on May 4, 2026, and early voting began on May 23 [2]. Polling in early May 2026 indicated Steve Hilton (R) at 18-20%, Xavier Becerra (D) at 10-18%, and Tom Steyer (D) at 12-18% [2][3][4]. Market odds for advancing from the primary show Hilton at 82% and Steyer at 69% [5]. A significant shift occurred following sexual assault allegations against another candidate, leading to their exit and catalyzing Becerra's rise in polls from 4-13% to 18% [6][7][8].
Former President Trump endorsed Hilton [8], leading to consolidation among Republican voters while Democrats remained split [8][9]. This split among Democratic candidates presents a risk of a Democratic lockout from the general election [8][9]. Despite his primary polling between 12-18% [2][3][4], Tom Steyer possesses a substantial $132 million war chest [9] and general election win odds ranging from 41-63% [9][10], suggesting potential for a strong performance if he advances.
A considerable portion of the electorate, between 14-23%, remains undecided [2][4], indicating that significant movement in candidate support is still possible before the primary. The economy has emerged as the top issue for 41% of voters [2][4], making candidates' platforms and messaging on economic concerns potentially crucial in swaying these undecided voters and shaping the final outcome.

Key Dates & Catalysts

  • Expiration: June 02, 2027
  • Closes: June 02, 2027
Sources (10)
  1. 1California gubernatorial election, 2026 - Ballotpediaballotpedia.org
  2. 2New California governor poll shows volatile race before June primaryyahoo.com
  3. 3Becerra Tied With Hilton for Lead in California Governor's Race: Poll - GV Wiregvwire.com
  4. 4California 2026 Poll: Swalwell Exit from Governor Race Opens Lane for Democrat Xavier Becerra - Emerson Pollingemersoncollegepolling.com
  5. 5Who will advance from the California Governor primary? | Live Odds Comparison | Prediction Huntpredictionhunt.com
  6. 6California governor race odds tracker: Tom Steyer's chances of success risenewsweek.com
  7. 7Becerra gains in California governor polls. 'We’re not slowing down'desertsun.com
  8. 82026 CA Governor's Race: Primary Election Weeks Away. What To Knowpatch.com
  9. 92026 CA Governor Race: Who Has the Edge? • Predictions, Odds & Warningspredictionsandodds.com
  10. 102026 California Primaries Odds: Governor Race & House Seatsdefirate.com