Short Answer

Phil Weiser is expected to win the Colorado governorship in 2026, driven by the state's historical Democratic lean, his fundraising advantage, and Decision Desk HQ's September 1, 2026 projection of a 91% win probability; the market prices this outcome at 95.0%.

1. Market Behavior & Drivers

The general election contest for Colorado's open gubernatorial seat is between Democrat Phil Weiser and Republican Victor Marx, according to reports following the primary elections. Incumbent Democrat Jared Polis is term-limited. The market has consistently priced the YES outcome as a long shot, with its probability never rising above 5.8%.
The contract price moved from 3.7% in late August to a high of 5.0% in early September. No specific news or development reported in the provided context coincides with this period of trading activity. The primary results that established the general election matchup were known well before this price movement occurred. The market continues to trade sideways in a narrow range.
  • Since last update (~28d): The model's headline probability for a winner declined by 90.6pp, resulting in a -0.7pp model-market edge.
  • Phil Weiser's model probability increased by 1.0pp, widening the model's edge.
  • Victor Marx's model probability gained 1.1pp; the market led a widened edge.
  • Overall projection confidence increased by 4.0pp to a strong 9.0 score.
  • Democratic candidate Phil Weiser holds a strong lead per forecast models and historical trends.
  • Weiser maintains a substantial fundraising advantage over his gubernatorial opponents.
  • The open seat and Greg Lopez's independent bid introduce some uncertainty.

Who Wins and Why

Outcome Market Model Why
Victor Marx 4.9% 4.2% Victor Marx faces strong Democratic trends, internal party divisions, and a significant fundraising deficit.
Phil Weiser 95.0% 95.8% Forecast models and historical trends overwhelmingly favor Weiser, who holds a substantial fundraising advantage.

Current Context

The 2026 Colorado gubernatorial election features an open seat [1][2][3]. Incumbent Democratic Governor Jared Polis is term-limited and cannot seek re-election [1][2][3][4]. The general election is scheduled for November 3, 2026 [5][6][7][8]. Attorney General Phil Weiser secured the Democratic nomination on June 30, 2026, defeating U.S. Senator Michael Bennet in the primary [1][2][3][9][4]. Victor Marx, a first-time candidate and missionary leader, won the Republican primary on June 30, 2026, defeating state Senator Barb Kirkmeyer in a close race [1][2][4]. Former Republican congressman Greg Lopez also qualified for the general election ballot in July 2026, running as an independent [10][11].
Current forecasts indicate a strong lead for the Democratic nominee [12]. As of August 31, 2026, Decision Desk HQ gives Democratic candidate Phil Weiser a 91% probability of winning the election [12]. The general election has not yet occurred; it is slated for November 3, 2026 [5][7][8].
Sources (12)
  1. 1Victor Marx wins GOP nod for governor, will face Democrat Phil Weiser in November | KUNCkunc.org
  2. 2Victor Marx defeats Barb Kirkmeyer as Colorado’s Republican gubernatorial primary crosses finish line - Denver Gazettedenvergazette.com
  3. 3Colorado Governor Primary Election 2026 Live Results: Bennet, Weiser and Morenbcnews.com
  4. 4Victor Marx defeated three other candidates in the Republican primary for governor of Colorado on June 30, 2026 - Ballotpedia Newsnews.ballotpedia.org
  5. 5Colorado gubernatorial and lieutenant gubernatorial election, 2026ballotpedia.org
  6. 62026 Colorado gubernatorial election - Wikipediaen.wikipedia.org
  7. 7Colorado state executive official elections, 2026 - Ballotpediaballotpedia.org
  8. 8Colorado elections, 2026 - Ballotpediaballotpedia.org
  9. 9Phil Weiser defeats Michael Bennet in the Democratic primary for governor of Colorado - Ballotpedia Newsnews.ballotpedia.org
  10. 10Independent gubernatorial candidate Greg Lopez, a former GOP congressman, qualifies for Colorado ballot - Colorado Politicscoloradopolitics.com
  11. 11News Release - Colorado Secretary of Statesos.state.co.us
  12. 122026 Colorado Governor Forecast | DDHQvotes.decisiondeskhq.com

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Market Data

Contract Snapshot

This Kalshi market resolves based on which party officially wins the Colorado Governor election. A 'Yes' contract for a listed candidate pays out if that candidate's party wins the election, while a 'No' contract pays out if their party does not win. The election is scheduled for November 3, 8:00 AM EST, with a maximum payout date of November 3, 2027.

Available Contracts

Market options and current pricing

Outcome bucket Yes (price) No (price) Last trade probability
Phil Weiser $0.98 $0.05 95%
Victor Marx $0.05 $0.98 5%

Market Discussion

The 2026 Colorado gubernatorial election, scheduled for November 3, 2026, will feature Democratic candidate Phil Weiser and Republican Victor Marx, as incumbent Democratic Governor Jared Polis is term-limited [1][2][3]. Prediction markets and political commentary heavily favor a Democratic victory, consistently pricing a Democratic win at approximately 91% to 96% probability as of September 9, 2026 [4][5][6][7][8]. This outlook is attributed to Colorado's trend of Democratic gubernatorial wins and the Republican party's structural disadvantages in the state [4][5][6][7].

Sources (8)
  1. 1Victor Marx wins GOP nod for governor, will face Democrat Phil Weiser in November | KUNCkunc.org
  2. 22026 Colorado gubernatorial election - Wikipediaen.wikipedia.org
  3. 3Colorado gubernatorial and lieutenant gubernatorial election, 2026ballotpedia.org
  4. 4https://polymarket.com/event/colorado-governor-winner-2026polymarket.com
  5. 52026 Colorado Governor Winner by Party | Polls & Oddspredictionedge.com
  6. 6Will a Democrat Win the Colorado Governor Election?lines.com
  7. 7Colorado Governor Election Winner Odds — Democrat 94¢predictionhunt.com
  8. 82026 Colorado Governor Forecast | DDHQvotes.decisiondeskhq.com

4. Trust Index

Octagon Trust Index Kalshi 80 Good
How it adds up
Integrity80% of score84Good
Trade quality20% of score64Caution

Includes the cost to trade: a $10,000 order loses about 1% 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
84Good

Outcome is hard to influence

No suspicious activity on any screen

Screened clean
Large tradesNo single trade dominates the tape. Clear
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
64Tradeable

Fills fine at modest size

2 contracts · worst first

Phil Weiser64
Tradeable · low confidence

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

Book spread 2% vs realized 0%
Victor Marx66
Tradeable · low confidence

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

Book spread 34% vs realized 2%
Move quality
66Mostly confirmed

Most moves carried real volume

2 contracts · worst first

Phil Weiser66
Mostly confirmed · medium confidence

Volume is light/neutral for the move over 7d

Victor Marx—
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
100Clear

Counts toward Resolution quality, not here

2 contracts · worst first

Phil Weiser100
Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
Victor Marx100
Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
Trade quality
64Caution

Tradable, but expect execution cost beyond small sizes.

Outcome quality 64 (notional-weighted across 2 scored legs)

$100 order: 0.8c slippage (<1% of a 96.7c contract)

$1,000 order: 0.9c slippage (<1% of a 96.7c contract)

$10,000 order: 1.2c slippage (~1% of a 96.7c contract)

Phil Weiser64Market scoreLiquidity64Move quality66Rule clarity100
Why 64
Liquidity
64 · Tradeable · low confidence

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

Book spread 2% vs realized 0%
Move quality
66 · Mostly confirmed · medium confidence

Volume is light/neutral for the move over 7d

Rule clarity
100 · Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
Victor Marx66Market scoreLiquidity66Move quality–Rule clarity100
Why 66
Liquidity
66 · Tradeable · low confidence

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

Book spread 34% vs realized 2%
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

underwriting_v1.4 · computed Sep 26, 2026

5. What polling data and historical trends underpin Phil Weiser's forecasted lead in the 2026 election?

Prediction Market Probability for Weiser95% to 97% [1][2]
Pollsmax Projected Vote Share for Weiser60.3% [1]
Decision Desk HQ Probability for Weiser91% [3][4][5]
Prediction markets overwhelmingly favor Phil Weiser in Colorado's 2026 gubernatorial election. This strong forecast shows implied probabilities consistently ranging from 95% to 97% for Democrat Phil Weiser to win [1][2]. This significant lead is attributed to Colorado's consistent Democratic performance in statewide elections, a substantial structural advantage in voter registration, and the state's 24-year history of electing Democratic governors [1][6]. Phil Weiser, the incumbent Colorado Attorney General, secured the Democratic nomination after defeating Michael Bennet in the primary held on June 30, 2026 [7].
Forecast models project a substantial electoral lead for Weiser over his opponent. Pollsmax anticipates Weiser will receive 60.3% of the vote compared to 39.7% for Marx, indicating a projected margin of 20.6 percentage points [1]. As of September 1, 2026, Decision Desk HQ forecasts a 91% probability of victory for Phil Weiser, with a projected vote margin of D+19 [3][4][5]. This forecast is based on 100% fundamentals, including partisan baseline, incumbency effects, the national environment, and net campaign financial advantage [3][4][5]. Victor Marx, a Marine Corps veteran, won a fractured Republican primary on June 30, 2026, and was declared the winner on July 9, 2026 [1].
Historical trends strongly underpin Weiser's current favorable position in Colorado. These trends include Colorado's status as a Democratic trifecta since 2019 [7]. The state has voted for the Democratic presidential candidate in every election since 2008 and has elected only one Republican governor since 1975 [7].
Sources (7)
  1. 12026 Colorado Governor Forecast | Election Odds & Latest Pollspollsmax.com
  2. 2Colorado Governor winner? Odds & Predictions 2026 - Kalshikalshi.com
  3. 32026 Colorado Governor Forecast | DDHQvotes.decisiondeskhq.com
  4. 42026 Colorado Governor Forecast | DDHQnewsnation-votes.decisiondeskhq.com
  5. 52026 Colorado Governor Forecast | DDHQintegration-votes.decisiondeskhq.com
  6. 6https://polymarket.com/event/colorado-governor-winner-2026/will-the-democrats-win-the-colorado-governor-race-in-2026?r=predictionhunteventspolymarket.com
  7. 7Phil Weiser defeats Michael Bennet in the Democratic primary for governor of Colorado - Ballotpedia Newsnews.ballotpedia.org

6. How do Phil Weiser's and Victor Marx's proposed policies on the Colorado River water crisis compare?

Policy Differentiation (Colorado River)Specific and detailed policy proposals differentiating approaches are not extensively detailed in reviewed sources [1][2].
Phil Weiser's Water StanceSupports Colorado Water Plan, protecting state water allocations, and sustainable management of the Colorado River [2].
Victor Marx's Water SuggestionSuggested looking to Utah's investment in water infrastructure as a model for Colorado [3][4].
Specific, detailed policy proposals from Phil Weiser and Victor Marx regarding the Colorado River water crisis are not extensively detailed, nor were their comprehensive current policy platforms for the 2026 general election explicitly contrasted in the reviewed sources [1][2]. Comprehensive policy plans for Victor Marx, specifically concerning this issue, are also limited in available records [3][4][5].
Phil Weiser prioritizes protecting Colorado's land, air, and water resources. As part of his gubernatorial platform, he has emphasized protecting these resources and has previously supported the Colorado Water Plan, advocating for the protection of state water allocations and ensuring sustainable management of the Colorado River [1][2][6]. However, detailed policy proposals that specifically differentiate his approach to the Colorado River crisis from Victor Marx's are not extensively outlined beyond his record as Attorney General [1][6].
Victor Marx considers Colorado's water a precious and vital resource. He has suggested examining Utah's investments in water infrastructure as a potential model for Colorado [3][4]. Nevertheless, comprehensive policy plans from Marx specifically addressing the Colorado River crisis remain limited in current records [3][4]. His campaign priorities have primarily focused on issues such as affordability, education, and public safety, with less specific detail available regarding his approach to the Colorado River water crisis [5].
Sources (6)
  1. 1Meet Phil | Phil Weiser for Coloradophilforcolorado.com
  2. 2Colorado Attorney General election, 2018 - Ballotpediaballotpedia.org
  3. 3Colorado's water is one of our most precious resourcesfacebook.com
  4. 4Victor Marx, the Republican nominee for governor, took the spotlight...facebook.com
  5. 5Victor Marx defeated three other candidates in the Republican primary for governor of Colorado on June 30, 2026 - Ballotpedia Newsnews.ballotpedia.org
  6. 6Colorado gubernatorial election, 2026 (June 30 Democratic primary)ballotpedia.org

7. What is the potential impact of Greg Lopez's independent candidacy on the vote share for Phil Weiser and Victor Marx?

Phil Weiser Win Probability91% (Decision Desk HQ, August 31, 2026) [1]
Phil Weiser Projected Vote MarginD+19 (Decision Desk HQ, August 31, 2026) [1]
Race RatingSolid Democratic/Safe Democratic (major prognosticators) [1]
Greg Lopez's independent bid could shift Republican votes. A former Republican who previously sought the GOP nomination, Lopez is running as an unaffiliated candidate in the 2026 Colorado gubernatorial election after leaving the party [2]. His independent candidacy is seen as a potential draw for Republicans who are dissatisfied with the Republican nominee, Victor Marx [2].
Phil Weiser is strongly favored to win the election. As of August 31, 2026, Democrat Phil Weiser is projected to secure a significant vote share margin [1]. Decision Desk HQ forecasts Weiser with a 91% probability of winning and a projected vote share margin of D+19 [1]. The race is rated as Solid Democratic/Safe Democratic by major prognosticators, though current forecasts do not explicitly detail the impact of Greg Lopez's candidacy on major party vote shares [1]. Factors such as voter dissatisfaction with current leadership, a potential budget shortfall, and the presence of third-party candidates like Lopez are noted as influences on the race [1].
Sources (2)
  1. 12026 Colorado Governor Forecast | DDHQvotes.decisiondeskhq.com
  2. 2Independent gubernatorial candidate Greg Lopez, a former GOP...coloradopolitics.com

8. What do the latest campaign finance reports reveal about the fundraising strength of Weiser, Marx, and Lopez?

Phil Weiser Contributions$6.95 million as of late summer 2026 [1][2]
Victor Marx Contributionsapproximately $2.93 million [1][2]
Greg Lopez Contributions$89,556 [1]
Democratic candidate Phil Weiser has significantly outraised his gubernatorial opponents. As of late summer 2026, Weiser's campaign reported total contributions exceeding $6.95 million and expenditures surpassing $6.6 million [1][2]. In comparison, Republican Victor Marx has raised approximately $2.93 million [1][2]. Independent candidate Greg Lopez trails significantly, having reported only $89,556 in total donations and $10,390 in cash on hand as of his latest disclosure [1].
A full comparative analysis of gubernatorial fundraising is partially obscured by federal reporting. Public FEC records for state-level executive races in Colorado often primarily reflect federal-level committee filings rather than dedicated state gubernatorial committee reports, which makes a direct comparative analysis from these federal records inconclusive for Weiser, Marx, and Lopez [3].
Sources (3)
  1. 1Colorado Democrats begin general election with big cash...coloradonewsline.com
  2. 2Quick Stats Detail - TRACER - Coloradotracer.sos.colorado.gov
  3. 32026 Colorado Governor Forecast | DDHQvotes.decisiondeskhq.com

9. What is Victor Marx's path to victory in the November 2026 general election?

Republican Primary WinVictor Marx won the Republican primary for Colorado Governor on June 30, 2026, with 39.86% of the vote [1][2][3]
Democratic Opponent Primary WinPhil Weiser won the Democratic primary on June 30, 2026, with approximately 55.1%–56.9% of the vote [4][5][6][7][8]
General Election RatingAs of July 2026, the Colorado gubernatorial general election is rated Solid or Safe Democratic [1]
Victor Marx secured the Republican nomination for Colorado Governor in June 2026. Marx, a U.S. Marine Corps veteran and CEO and founder of All Things Possible Ministries, won the Republican primary on June 30, 2026, with 39.86% of the vote [9][10][1][11][2][3]. His campaign platform emphasized law and order, affordability, and accountability [9][10][1][11][2][3]. For the November 2026 general election, Marx's stated strategy involves mobilizing a disaffected base and framing his campaign as a 'movement' [9][1][11].
Attorney General Phil Weiser is strongly favored in the gubernatorial election. Weiser, the current Colorado Attorney General, is Marx's Democratic opponent, having won his primary on June 30, 2026, by defeating U.S. Senator Michael Bennet with approximately 55.1%–56.9% of the vote [4][5][6][7][8]. Political observers and prediction markets overwhelmingly view Phil Weiser as the heavy favorite to win the governorship [9][12][5]. This outlook is largely due to Colorado's consistent Democratic leanings, as the state has not seen a Republican statewide victory since 2016 [9][12][5].
Victor Marx faces significant challenges in a heavily Democratic-leaning state. Existing internal divisions within the Colorado Republican Party also complicate Marx's prospects following his primary win [9][12][5]. As of July 2026, political analysts have rated the Colorado gubernatorial general election as Solid or Safe Democratic [1][9][12][5]. Marx also contends with considerable skepticism and a lack of support from some mainstream party figures [1][9][12][5]. The available research does not detail Marx's specific strategy for overcoming these significant challenges to secure a victory [9][12][5][1].
Sources (12)
  1. 1Victor Marx defeated three other candidates in the Republican primary for governor of Colorado on June 30, 2026 - Ballotpedia Newsnews.ballotpedia.org
  2. 2Colorado gubernatorial election, 2026 (June 30 Republican primary)ballotpedia.org
  3. 32026 Colorado Governor | Live Election Resultsvotes.decisiondeskhq.com
  4. 4Victor Marx selects fellow Marine veteran as running mate in...coloradosun.com
  5. 5Victor Marx - Wikipediaen.wikipedia.org
  6. 62026 Colorado gubernatorial election - Wikipediaen.wikipedia.org
  7. 7Colorado gubernatorial election, 2026 (June 30 Democratic primary)ballotpedia.org
  8. 82026 Colorado Governor | Live Election Resultsvotes.decisiondeskhq.com
  9. 9Colorado Republicans were already divided. Then Victor Marx got...cpr.org
  10. 10Victor Marx for Governorvictor2026.com
  11. 11Republican primary for governor of Colorado features competing ideologies among the candidates - Ballotpedia Newsnews.ballotpedia.org
  12. 12Victor Marx reflects the unsettling nature of today politics - LA Timeslatimes.com

10. What Could Change the Odds

Key Catalysts

The 2026 Colorado gubernatorial election is set for November 3, 2026 [1][2]. Phil Weiser, the Democratic nominee, won the Democratic primary on June 30, 2026 [3][4][5]. Victor Marx is the Republican nominee [3][6]. Greg Lopez has qualified for the ballot as an independent candidate [7], joining Stephen Hamilton, Erik Underwood, and Eric Mulder as additional general election candidates [2].
As of September 9, 2026, prediction markets and forecasting models indicate a strong preference for Democrat Phil Weiser to win, with implied win probabilities typically between 91% and 96% [8][9][10][11]. Decision Desk HQ, as of September 1, 2026, projects a 91% win probability for Phil Weiser against Republican Victor Marx [8][12]. A potential bearish catalyst for the Republican ticket involves a campaign finance complaint filed against Victor Marx concerning alleged excess and improper contributions, though its broader market impact is not yet certain [10]. Prediction markets will close on November 6, 2026 [10].

Key Dates & Catalysts

  • Expiration: November 03, 2027
  • Closes: November 03, 2027
Sources (12)
  1. 1Colorado gubernatorial and lieutenant gubernatorial election, 2026ballotpedia.org
  2. 2Colorado elections, 2026 - Ballotpediaballotpedia.org
  3. 3Victor Marx wins GOP nod for governor, will face Democrat Phil Weiser in November | KUNCkunc.org
  4. 4Colorado Governor Primary Election 2026 Live Results: Bennet, Weiser and Morenbcnews.com
  5. 5Colorado gubernatorial election, 2026 (June 30 Democratic primary)ballotpedia.org
  6. 6Victor Marx defeats Barb Kirkmeyer as Colorado’s Republican gubernatorial primary crosses finish line - Denver Gazettedenvergazette.com
  7. 7Independent gubernatorial candidate Greg Lopez, a former GOP congressman, qualifies for Colorado ballot - Colorado Politicscoloradopolitics.com
  8. 82026 Colorado Governor Forecast | DDHQvotes.decisiondeskhq.com
  9. 92026 Colorado Governor Forecast | Election Odds & Latest Pollspollsmax.com
  10. 102026 Colorado Governor Winner by Party | Polls & Oddspredictionedge.com
  11. 11Will a Democrat Win the Colorado Governor Election?lines.com
  12. 122026 Colorado Governor Forecast | DDHQintegration-votes.decisiondeskhq.com