Short Answer

Amy Acton is likely to win the 2026 Ohio gubernatorial election, per prediction market consensus which contrasts with other analysts favoring Vivek Ramaswamy (56.0%).

1. Market Behavior & Drivers

This market's pricing reflects a settled general election contest between Democrat Amy Acton and Republican Vivek Ramaswamy. The matchup was determined after the May 5 party primaries, where Acton and Ramaswamy each won their respective nominations. Since that event, trading has been confined to a narrow six-point band between 41% and 47% for a Democratic victory.
The stability of the market indicates that no subsequent developments have materially altered the perceived odds. The price has moved sideways with a slight drift downward from 44% to 43%. The context provides no specific news or polling data to explain these minor fluctuations. The market appears to have fully priced in the known candidates and is awaiting a new catalyst to establish a clear trend.
  • Since last update (~34d): Our model's edge over the market flipped significantly to +8.5pp, now favoring our model's view.
  • Market sentiment shifted strongly to Amy Acton (+6.0pp) and away from Vivek Ramaswamy (-7.0pp).
  • Our confidence score increased by +3.0pp, now standing at a higher 8.0.
  • Amy Acton leads current prediction markets with a 56-59% win probability.
  • Vivek Ramaswamy is narrowly favored by forecasting models (52% win probability).
  • Ramaswamy holds a substantial fundraising advantage, also rated Lean Republican.

Who Wins and Why

Outcome Market Model Why
Vivek Ramaswamy 44.0% 52.0% Decision Desk HQ forecasts Vivek Ramaswamy as narrowly favored with a substantial fundraising advantage [17][18][5][1][2][3][4][5][6][3].
Amy Acton 56.0% 48.0% Current prediction markets generally indicate Amy Acton with a slight lead [2][3].

Current Context

The 2026 Ohio gubernatorial general election is scheduled for November 3. Major party primary elections were held on May 5, 2026. Democratic nominee Amy Acton, running with David Pepper, won her party's primary, while Republican nominee Vivek Ramaswamy, running with Rob McColley, won his [1][2][3][4]. The general election ballot also includes Libertarian Don Kissick and independent write-in candidate Tim Grady [5][6][1].
A recent incident intensified the tone of the gubernatorial campaign. On September 6, 2026, Patrick Havas was arrested at the Canfield Fair after allegedly moving aggressively toward Amy Acton. Havas was charged with misdemeanors, not felonies, but the event has sharpened the campaign's discourse [7][8][9][10][11].
Prediction markets and analysts show a tight and competitive race. As of September 9, 2026, prediction markets indicate a near 50-50 split between Acton and Ramaswamy across various platforms [12][13][14][15]. Decision Desk HQ's forecast, also as of September 9, 2026, rates the race a toss-up, with Vivek Ramaswamy slightly favored at a 52% win probability over Amy Acton's 48% [16][17]. As of September 2026, major election analysts provide mixed ratings: Cook Political Report rates it a Toss-up, while Inside Elections and Sabato's Crystal Ball rate it as Lean Republican [1].
Sources (17)
  1. 1Ohio gubernatorial and lieutenant gubernatorial election, 2026ballotpedia.org
  2. 22026 Ohio gubernatorial election - Wikipediaen.wikipedia.org
  3. 3Ohio gubernatorial and lieutenant gubernatorial election, 2026 (May 5 Democratic primary) - Ballotpediaballotpedia.org
  4. 42026 Ohio Governor | Live Election Resultsvotes.decisiondeskhq.com
  5. 5Amy Acton - Ballotpediaballotpedia.org
  6. 6Don Kissick - Ballotpediaballotpedia.org
  7. 7Prosecutor says man accused of charging toward Ohio governor candidate wanted to ask questions13abc.com
  8. 8Amy Acton fair suspect won't face felony charges due to video gap | Fox Newsfoxnews.com
  9. 9With Ohio’s governorship up for grabs, a toxic race turns violent - The Washington Postwashingtonpost.com
  10. 10Prosecutor: Man accused of crimes in Acton incident didn’t commit felonies -morningjournalnews.com
  11. 11Man pleads not guilty to misdemeanor charges in Ohio fair incident involving Amy Actonnbcnews.com
  12. 12Ohio Governor Election Winner Predictions & Odds 2026 - Polymarketpolymarket.com
  13. 13Ohio Governor winner? Odds & Predictions 2026 - Kalshikalshi.com
  14. 14Ohio Governor winner Elections Prediction Market - Robinhoodrobinhood.com
  15. 15Ohio Governor winner? — In 2026 — Odds & Prediction | Predictions.iopredictions.io
  16. 162026 Ohio Governor Forecast | DDHQvotes.decisiondeskhq.com
  17. 172026 Ohio Governor Polling | DDHQvotes.decisiondeskhq.com

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Market Data

Contract Snapshot

This Kalshi market, titled "Ohio Governor winner?", resolves based on the political party that wins the election. A "Yes" resolution triggers if the specified party (e.g., Democratic or Republican, as presented) wins the Ohio Governor election. Conversely, a "No" resolution triggers if that specified party does not win the election. Trading for the market begins on November 3, at 8:00 AM EST, and the maximum payout date is November 3, 2027.

Available Contracts

Market options and current pricing

Outcome bucket Yes (price) No (price) Last trade probability
Amy Acton $0.57 $0.44 56%
Vivek Ramaswamy $0.44 $0.57 44%

Market Discussion

The 2026 Ohio gubernatorial election, scheduled for November 3, 2026, features Republican Vivek Ramaswamy and Democrat Amy Acton, who both won their respective primaries on May 5, 2026 [1][2][3][4][5][6][7]. As of early September 2026, political analysts and polling aggregators characterize the race as a toss-up, with prediction markets showing a highly competitive contest that has recently favored Amy Acton [8][9][10][11][12][13][14][15]. However, Decision Desk HQ forecasts Vivek Ramaswamy with a narrow 52% probability of winning against Acton's 48% [13][7].

Sources (15)
  1. 1Democrat Amy Acton and Republican Vivek Ramaswamy advance in Ohio election for governor • Ohio Capital Journalohiocapitaljournal.com
  2. 2Ohio primary: Vivek Ramaswamy wins GOP nom for governor, will face Democrat Amy Acton this fall | Ideastream Public Mediaideastream.org
  3. 3Vivek Ramaswamy wins Republican nomination for Ohio governorbbc.com
  4. 4Ohio Governor Primary Election 2026 Live Resultsnbcnews.com
  5. 5Ohio gubernatorial and lieutenant gubernatorial election, 2026ballotpedia.org
  6. 6Governor of Ohio - Ballotpediaballotpedia.org
  7. 72026 Ohio Governor Forecast | DDHQvotes.decisiondeskhq.com
  8. 8Vivek Ramaswamy's Chances of Winning Ohio Governor Race Flip - Newsweeknewsweek.com
  9. 9Ohio Governor winner? Odds & Predictions 2026 - Kalshikalshi.com
  10. 10Ohio Governor Election Winner Predictions & Odds 2026 - Polymarketpolymarket.com
  11. 11https://polymarket.com/event/ohio-governor-winner-2026?r=kooespolymarket.com
  12. 12Ohio Governor Election Winner 2026 Odds | Polymarket & Kalshipredictmarketcap.com
  13. 132026 Ohio Governor Forecast | DDHQintegration-votes.decisiondeskhq.com
  14. 14Analysis: Cook Political Report moves Ohio governor race to 'toss up' | WOSU Public Mediawosu.org
  15. 152026 Ohio Governor Forecast | Election Odds & Latest Pollspollsmax.com

4. Trust Index

Octagon Trust Index Kalshi 80 Good

Largest single print on GOVPARTYOH-26-R carried 53% of its $6,855 tape (window is 100% of 24h flow; print is 2d old)

Integrity risk· Large trades

How it adds up
Integrity80% of score81Good
Trade quality20% of score77Good

Includes the cost to trade: a $10,000 order loses about 7% of the price to slippage.

Trust score80Good

Weighted blend with hard caps — a critically weak safety pillar, or a severe trading anomaly, caps the total regardless of the rest. Full methodology · About the Trust Index

Trust profile
Integrity4 screens run · 6 don't apply
Market integrity
74Good

Outcome is hard to influence

Large tradesTrade signals · medium confidence

Largest single print on GOVPARTYOH-26-R carried 53% of its $6,855 tape (window is 100% of 24h flow; print is 2d old)

Screened clean
Thin-volume movesNo significant move Clear
Size patternsNo distribution read Clear
2 screens not run
Outcome control · doesn't apply to this market type
Thin-leg conviction · doesn't apply to this market type
Info fairness
80Good

Structural prior — no screens apply

No suspicious activity on any screen

Screened clean
Information exposureNo concentrated group can know the outcome materially early. Clear
4 screens not run
Move vs. catalyst · doesn't apply to this market type
Longshot repricing · doesn't apply to this market type
Pre-broadcast certainty · doesn't apply to this market type
Cross-venue timing · doesn't apply to this market type
Resolution quality
92Strong

Resolution mechanism is dependable

No suspicious activity on any screen

Resolution rules read: Clear

Liquidity
81Deep

Size fills near the screen price

2 contracts · worst first

Amy Acton81
Deep · low confidence

Light recent trading — size may not fill near the screen price.

Vivek Ramaswamy81
Deep · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
70Stable

No significant moves

2 contracts · worst first

Amy Acton—
No significant move (6h)

Price was stable over the last 6 hours.

Vivek Ramaswamy—
No significant move (24h)

Price was stable over the last 24 hours.

Rule clarity
100Clear

Counts toward Resolution quality, not here

2 contracts · worst first

Amy Acton100
Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
Vivek Ramaswamy100
Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
Trade quality
77Good

Order book supports trading

Deep and tight enough to trade efficiently.

Outcome quality 81 (notional-weighted across 2 scored legs)

$100 order: 0.5c slippage (<1% of a 57.5c contract)

$1,000 order: 0.5c slippage (<1% of a 57.5c contract)

$10,000 order: 3.8c slippage (~7% of a 57.5c contract)

Amy Acton81Market scoreLiquidity81Move quality–Rule clarity100
Why 81
Liquidity
81 · Deep · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
100 · Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
Vivek Ramaswamy81Market scoreLiquidity81Move quality–Rule clarity100
Why 81
Liquidity
81 · Deep · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (24h)

Price was stable over the last 24 hours.

Rule clarity
100 · Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear

underwriting_v1.4 · computed Sep 20, 2026

5. How do Amy Acton's and Vivek Ramaswamy's platforms compare on key economic and social issues for Ohio in 2026?

Vivek Ramaswamy Projected Win Probability52% (as of early September 2026) [1][2]
Amy Acton Platform FocusAffordability (prescription drugs, housing, healthcare) and public health [3][4][5]
Vivek Ramaswamy Platform FocusBusiness experience, economic opportunity, and critique of government inefficiency [6][7]
Amy Acton and Vivek Ramaswamy present distinct platforms for the 2026 Ohio gubernatorial election. Amy Acton prioritizes affordability and public health initiatives for Ohio. Drawing on her background as a public health director, Acton's platform emphasizes reducing costs across essential services. Key proposals include 'Ohio Rx,' a state platform designed to lower prescription drug prices, and broader efforts to tackle housing and healthcare expenses [3][8][4][5]. She also supports voter ID requirements, a stance that distinguishes her from some members of her own party [3][5].
Vivek Ramaswamy emphasizes economic opportunity and government reform for Ohio. His campaign centers on leveraging his business acumen to foster economic growth and strengthen communities, while also critiquing government inefficiency [6][7]. Ramaswamy positions himself as a successful entrepreneur allied with Donald Trump [6][7][8]. His specific proposals include consolidating Ohio's university system and raising the voting age to 25 [8]. As of early September 2026, Ramaswamy is projected with a narrow lead in the gubernatorial election, holding a 52% win probability [1][2].
Sources (8)
  1. 12026 Ohio Governor Forecast | DDHQvotes.decisiondeskhq.com
  2. 22026 Ohio Governor Polling | DDHQvotes.decisiondeskhq.com
  3. 3Amy Acton - Ballotpediaballotpedia.org
  4. 4Dr. Amy Acton for Governoractonforgovernor.com
  5. 5Democratic Ohio governor candidate Amy Acton breaks with party to...ohiocapitaljournal.com
  6. 6Home - Vivek for Ohiovivekforohio.com
  7. 7Candidates for Ohio governor work to define themselves and their...statenews.org
  8. 8Ohio GOP primary for governor shows potential headwinds for Ramaswamy as he looks to fall campaign | The Associated Pressap.org

6. What did the May 2026 primary results indicate about Vivek Ramaswamy's geographic base of support within Ohio?

Primary Win Margin82.43% [1][2]
Cuyahoga County Vote Share74.2% [1][3][4]
Delaware County Vote Share70.0% [1][3][4]
Vivek Ramaswamy secured a decisive victory in the May 2026 primary. On May 5, 2026, he won the Republican gubernatorial primary with 82.43% of the vote [1][2]. His geographic base of support within Ohio was notably broad-based, demonstrating strong margins across both urban and rural counties [1][3][4].
Ramaswamy's appeal extended across diverse counties in Ohio. His consistent performance was evident in specific county results, such as 74.2% of the vote in Cuyahoga County, 70.0% in Delaware County, 69.5% in Franklin County, 70.3% in Butler County, and 71.1% in Clermont County [1][3][4]. Although some reports on the May 2026 primary emphasized his overall margin and his Trump-backed status, these detailed outcomes clearly illustrated his widespread strength across varied regions [5].
Sources (5)
  1. 12026 Ohio Governor | Live Election Resultsvotes.decisiondeskhq.com
  2. 2Ohio gubernatorial and lieutenant gubernatorial election, 2026ballotpedia.org
  3. 32026 Ohio Governor Vote History | DDHQvotes.decisiondeskhq.com
  4. 42026 Ohio Governor Live Election Results | DDHQintegration-votes.decisiondeskhq.com
  5. 5Ohio Primary-Election Results: Sherrod Brown and Vivek...newyorker.com

7. How might the September 2026 Canfield Fair incident impact polling among key voter demographics for Amy Acton?

Canfield Fair Incident StatusNo credible reports as of September 9, 2026 [1][2][3][4]
Ohio Governor's RaceEffectively tied between Amy Acton and Vivek Ramaswamy [5][6]
Ramaswamy Win Probability (Forecast)52% [3][7][8]
Conflicting reports exist regarding a September 2026 Canfield Fair incident involving Ohio gubernatorial candidate Amy Acton. Some sources detail an arrest on September 6, 2026, of Patrick Havas, who allegedly lunged at Acton while carrying weapons and subsequently faced misdemeanor charges. This reported event garnered broad bipartisan condemnation [9][10][11][12]. However, other information explicitly states that as of September 9, 2026, there are no credible reports or documented evidence of such an incident [1][2][3][4].
Contradictory information prevents assessing the incident's impact on Amy Acton's polling. Due to these inconsistencies, the available research does not provide sufficient data to determine how a potential September 2026 Canfield Fair incident might affect polling among key voter demographics for Acton. As of September 9, 2026, the Ohio governor's race between Amy Acton and Vivek Ramaswamy remains highly competitive and is effectively tied in polls, with prediction markets showing very narrow, shifting margins for both candidates [5][6]. Recent forecasts indicate Ramaswamy with a slight 52% win probability compared to Acton's 48% [3][7][8].
A federal judge temporarily blocked a voter registration law on September 8. In related electoral news, a federal judge issued a decision on September 8, 2026, to temporarily block a state law requiring documentary proof of citizenship for voter registration. This ruling has drawn sharp criticism from Ohio Secretary of State Frank LaRose [13].
Sources (13)
  1. 1Amy Acton - Ballotpediaballotpedia.org
  2. 22026 Ohio Governor Live Election Results | DDHQvotes.decisiondeskhq.com
  3. 32026 Ohio Governor Forecast | DDHQvotes.decisiondeskhq.com
  4. 42026 Ohio Governor Live Election Results | DDHQvotes.decisiondeskhq.com
  5. 52026 Ohio gubernatorial election - Wikipediaen.wikipedia.org
  6. 6https://polymarket.com/event/ohio-governor-winner-2026polymarket.com
  7. 7Election 2026 Polls - Dave Leip's Atlas of U.S. Presidential Electionsuselectionatlas.org
  8. 82026 Ohio Governor Polling | DDHQvotes.decisiondeskhq.com
  9. 9Man pleads not guilty to misdemeanor charges in Ohio fair incident...nbcnews.com
  10. 10Prosecutor: No felony charges for man accused of lunging at Acton -vindy.com
  11. 11Assailant lunged at Ohio gubernatorial candidate Amy Acton at Canfield Fair, campaign says | Ideastream Public Mediaideastream.org
  12. 12Patrick Havas to face a judge after incident with Dr. Amy Acton at Canfield Faircleveland19.com
  13. 13Federal judge temporarily blocks Ohio documentary proof of citizenship requirement - Ballotpedia Newsnews.ballotpedia.org

8. What does public polling data from the 2026 general election period indicate about the trajectory of the Acton vs. Ramaswamy race?

Vivek Ramaswamy win probability52% (as of September 9, 2026) [1][2]
Amy Acton win probability48% (as of September 9, 2026) [1][2]
NYT/Siena poll (June 2026)Tied 47%-47% [3]
The 2026 Ohio gubernatorial race remains a statistical tie. The contest between Democrat Amy Acton and Republican Vivek Ramaswamy is widely regarded as a toss-up, with public polling data in early September 2026 consistently indicating a near-statistical tie [3][4]. As of September 9, 2026, Decision Desk HQ's forecast slightly favors Vivek Ramaswamy with a 52% win probability, compared to Amy Acton's 48% [1][2].
Public polling throughout 2026 has revealed a highly competitive contest. Recent surveys consistently indicated a tight race between the candidates. For example, a New York Times/Siena poll in June 2026 reported a 47%-47% tie. An Impact Research poll in July 2026 placed Ramaswamy at 47% and Acton at 46%, while an August 2026 poll indicated a 50%-48% split in favor of Ramaswamy [3][5]. These results frequently fall within or close to the margin of error, underscoring the close nature of the race [5].
Prediction markets also corroborate the race's toss-up status. In September 2026, prediction markets showed probabilities for both Acton and Ramaswamy consistently around 50% on major platforms such as Kalshi and Polymarket [3][6]. The primary general election candidates for the 2026 Ohio gubernatorial race are Amy Acton (Democrat) and Vivek Ramaswamy (Republican), alongside other candidates like Don Kissick (L) and Tim Grady (Independent) [5].
Sources (6)
  1. 12026 Ohio Governor Polling | DDHQvotes.decisiondeskhq.com
  2. 22026 Ohio Governor Forecast | DDHQvotes.decisiondeskhq.com
  3. 3Ohio Governor Odds 2026: Acton Vs Ramaswamy Verdict | OddsShopperoddsshopper.com
  4. 4Candidates for Ohio governor work to define themselves and their...statenews.org
  5. 5Ohio gubernatorial and lieutenant gubernatorial election, 2026ballotpedia.org
  6. 6Ohio Governor winner? Odds & Predictions 2026 - Kalshikalshi.com

9. What do the latest 2026 campaign finance disclosures reveal about the fundraising totals and spending priorities of Amy Acton versus Vivek Ramaswamy?

Vivek Ramaswamy Fundraising$50 million [1][2][3][4][5][6]
Amy Acton Fundraising$16.5 million as of August 2026 [1][2][3][4][5]
Ramaswamy Personal Contribution$25 million [3][4][5][7][6]
Republican Vivek Ramaswamy has accumulated significantly more campaign funds than Democrat Amy Acton. Ramaswamy has raised a record $50 million for his Ohio campaign as of August 2026, substantially surpassing Acton's reported $16.5 million total [1][2][3][4][5][6]. A significant portion of Ramaswamy's fundraising, approximately half or $25 million, originated from his personal funds, including a direct loan to his campaign [3][4][5][7][6]. In contrast, Amy Acton's fundraising relies heavily on grassroots support, attracting over 153,000 individual contributors in the second quarter of 2026 alone [1][2][3][4][5].
Vivek Ramaswamy's campaign spending priorities include high-volume digital advertising, private jet leases, and considerable credit card expenditures [3][4][5][7]. He is currently deploying these funds for advertising campaigns specifically targeting Amy Acton in anticipation of the November 2026 general election [6]. While the research did not specify Acton's spending priorities, the 2026 Ohio Governor's race is presently considered a highly competitive toss-up as of early September 2026 [8][9].
Sources (9)
  1. 1Ohio governor's race: Where donations are coming from - NBC4nbc4i.com
  2. 2Dr. Amy Acton Announces Record-Breaking $9.4 Million Raised in...actonforgovernor.com
  3. 3Money in motion: New reports detail fundraising and spending in...ohiocpa.com
  4. 4Ohio Republican Vivek Ramaswamy holds big cash lead over...ohiocapitaljournal.com
  5. 5Ramaswamy invests $25M of his own money into Ohio governor bid...foxnews.com
  6. 6Ohio GOP primary for governor shows potential headwinds for Ramaswamy as he looks to fall campaign | The Associated Pressap.org
  7. 7Ohio GOP candidate for governor has put $500000 on the campaign...ohiocapitaljournal.com
  8. 8https://polymarket.com/event/ohio-governor-winner-2026polymarket.com
  9. 92026 Ohio Elections, Odds & Candidates | Prediction Edgepredictionedge.com

10. What Could Change the Odds

Key Catalysts

The 2026 Ohio gubernatorial election, an open-seat contest scheduled for November 3, 2026, features confirmed nominees Democrat Amy Acton and Republican Vivek Ramaswamy [1]. As of September 9, 2026, prediction markets such as Polymarket and Kalshi show Amy Acton with a 57-59% win probability, while Vivek Ramaswamy stands at approximately 41-43% [2][3]. This contrasts with some polling aggregators and forecasting models, including the Decision Desk HQ forecast as of August 31, 2026, which reported Vivek Ramaswamy with a 52% probability of winning compared to Amy Acton's 48% [4]. Other models suggest a near-toss-up race, consistent with polling averages where candidates are within 0.2-0.4 percentage points of each other [5][4].
Significant catalysts influencing this race include campaign fundraising and recent campaign events or controversies [3]. Vivek Ramaswamy maintains a considerable cash-on-hand advantage, holding $26.8 million compared to Amy Acton's $8.1 million [3]. These financial disparities, alongside unfolding campaign events and controversies, have influenced voter sentiment and subsequently impacted market movements [3].

Key Dates & Catalysts

  • Expiration: November 03, 2027
  • Closes: November 03, 2027
Sources (5)
  1. 12026 Ohio gubernatorial electionen.wikipedia.org
  2. 2Vivek Ramaswamy's Chances of Winning Ohio Governor Race Flip - Newsweeknewsweek.com
  3. 3Amy Acton's chance of beating Vivek Ramaswamy in Ohio as GOP voter accused of attack - Newsweeknewsweek.com
  4. 42026 Ohio Governor Forecast | DDHQvotes.decisiondeskhq.com
  5. 52026 Ohio Governor Forecast | DDHQintegration-votes.decisiondeskhq.com