Short Answer

Harriet Hageman is expected to win the Wyoming Senate seat given overwhelming historical Republican dominance in the state and a "Solid Republican" rating from Cook Political Report; the market prices this outcome at 98.8%.

1. Market Behavior & Drivers

The primary victories of Republican Harriet Hageman and Democrat James W. Byrd on August 18 established the general election matchup. Hageman's win in the GOP primary is the key driver of this market's pricing. Given Wyoming's strong Republican lean, her securing the nomination locked in the expectation of a GOP victory, pushing the contract price into the high-90s percentile where it has since remained.
The market has subsequently traded sideways in a tight range between 97.4% and 99.5%. The provided context offers no specific news or catalyst to explain these minor fluctuations. With a total volume of 1,005 contracts, the small price shifts appear to reflect low-liquidity trading in an already settled market rather than a reaction to new fundamental information.
  • Since last update (~43d): Model increased Harriet Hageman's probability by +0.5pp, while the market fell -1.0pp, flipping the edge.
  • This model-led divergence shifted the Hageman edge by +1.5pp, now valuing her at +0.6pp.
  • James Byrd's probability decreased in both the model (-0.5pp) and market (-0.6pp).
  • Our confidence score for this market remained unchanged at 9.0.
  • Republicans likely win Wyoming Senate, with overwhelming historical dominance and "Solid Republican" rating.
  • Harriet Hageman maintains significant fundraising lead, strengthening high projected win probabilities.
  • James Byrd faces historic Democratic odds and significant fundraising deficits.

Who Wins and Why

Outcome Market Model Why
Harriet Hageman 98.8% 99.4% Wyoming has overwhelming historical Republican dominance, with Hageman forecast to win by a significant margin.
James Byrd 1.3% 0.6% Wyoming is a deeply Republican state, and James Byrd faces a significant fundraising deficit.

Current Context

The 2026 Wyoming Senate election is an open seat with a strong Republican lean. Republican Harriet Hageman and Democrat James W. Byrd will contest the November 3, 2026 general election, as incumbent Republican Cynthia Lummis is retiring [1][2]. Both candidates won their respective primaries on August 18, 2026 [1][3]. The Wyoming Secretary of State's official materials confirm Hageman's candidacy and primary results [4][5]. The Rutgers Center for American Women and Politics summary indicates the race is rated Solid Republican by Cook Political Report [3].
Prediction markets and forecast models overwhelmingly favor Hageman based on fundamentals. Polling Forecast projects Hageman to win with a Republican margin of R+31.2, reflecting an 80% simulation range in its model [6]. This forecast relies on fundamentals, as its report cites no general election poll of the two nominees [6]. As of October 22, 2026, prediction markets largely align with this view: Polymarket lists approximately 99% for Hageman or the Republican nominee and 1-2% for Byrd or the Democratic nominee; Kalshi-linked reporting places the Republican outcome near 99% [7][8][9]. The apparent consensus for Hageman rests on Wyoming's strong Republican fundamentals, her nomination, expert race ratings, and prediction-market pricing, rather than a direct head-to-head poll, which is not verified in the cited polling feeds [10][6].
Wyoming's general election is set for November 3, with early voting underway. The primaries were held on August 18, 2026, and the general election is scheduled for November 3, 2026 [1][11]. Early voting began on October 6, and mail registration closed on October 19 [11][12]. Election Day registration remains available under Wyoming rules [1].
Sources (12)
  1. 1United States Senate election in Wyoming, 2026 - Ballotpediaballotpedia.org
  2. 22026 United States Senate election in Wyomingen.wikipedia.org
  3. 3Results from the August 18th Primaries in Alaska, Florida, and...cawp.rutgers.edu
  4. 42026 Primary Election Candidate Rostersos.wyo.gov
  5. 52026 Primary Statewide Candidates Summary Reportsos.wyo.gov
  6. 6Wyoming Senate: 2026 forecast | Polling Forecastpollingforecast.com
  7. 7Wyoming Senate Election Winner Predictions & Odds 2026 | Polymarketpolymarket.com
  8. 8Polymarketpolymarket.us
  9. 9Wyoming Senate Odds — Live Prediction Market Pricespredictionscout.com
  10. 10Latest Senate Polls: Midterm Elections 2026nytimes.com
  11. 112026 Wyoming U.S. Senate Election: Polls, Candidates, Money & Dates | Election.orgelection.org
  12. 122026 Wyoming Senate Election: Polls & Odds | Prediction Edgepredictionedge.com

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Market Data

Contract Snapshot

This market resolves based on the official winner of the Wyoming Senate general election, scheduled for November 3, 2026. A "Yes" resolution for a specific candidate, such as Harriet Hageman, occurs if that individual is officially declared the winner of the election; otherwise, a "No" resolution occurs if they do not win. The contract rules explicitly state that the market "Resolves by winning party."

Available Contracts

Market options and current pricing

Outcome bucket Yes (price) No (price) Last trade probability
Harriet Hageman $0.99 $0.01 99%
James Byrd $0.01 $0.99 1%

Market Discussion

Traders overwhelmingly predict Harriet Hageman (Republican) will win the Wyoming Senate race, with current market probabilities indicating a 98.7% chance. This strong consensus is supported by Wyoming's history as a deeply Republican state (e.g., R +45.8% in the 2024 presidential election) and Harriet Hageman's substantial fundraising lead of $2.7 million compared to James Byrd's $22.6K. The forecast also projects a significant Republican margin of victory at R +36.5.

4. What historical election data and demographic trends in Wyoming underpin the 'Solid Republican' forecast for the Hageman vs. Byrd race?

Trump 2020 Presidential Vote69.5% (Trump) vs. 26.4% (Biden) [1]
Average Republican Senate Vote72.5% (Republican) vs. 24.1% (Democratic) [1]
Registered Electorate (Republican)75.18% [2]
Wyoming consistently exhibits overwhelming Republican dominance across all levels of elections. The 'Solid Republican' forecast for the Hageman vs. Byrd race is substantially supported by Wyoming's historical election data, which demonstrates consistent and overwhelming Republican dominance in federal and state contests [3][4][1][2]. In the 2020 presidential election, Donald Trump secured 69.5% of the vote in Wyoming, significantly surpassing Joe Biden's 26.4% [1]. This pattern extends to other major races; Republican nominees in the five most recent Senate elections averaged 72.5% compared to 24.1% for Democratic nominees, and the 2022 at-large House race resulted in a Republican victory with 68.18% of the vote [1][5]. Gubernatorial races also reflect this trend, with Republicans averaging 67.3% across the five listed contests [1].
Demographic and voter registration data further cement Wyoming's strong Republican alignment. An Independent Voter Project estimate indicates the state's registered electorate is 75.18% Republican, 12.25% Democratic, and 10.81% independent [2]. The state's demographics, characterized by an 82.1% non-Hispanic White population and high homeownership rates, are consistent with a predominantly Republican statewide electorate [4]. The empirical foundation for the 'Solid Republican' forecast combines persistent GOP margins across all government levels, Republican control in most counties, robust Republican voter registration, and the absence of any clear Democratic statewide breakthrough [6][5][1]. However, important caveats include the race being an open seat, the current lack of general-election polling, and the potential for a candidate-specific campaign to reduce the typical Republican margin [6].
Sources (6)
  1. 1Presidential election in Wyoming, 2024ballotpedia.org
  2. 2Voter Registration Data by State: Party, Turnout & Trendsindependentvoterproject.org
  3. 32026 Wyoming Senate Forecast | Election Odds & Latest...pollsmax.com
  4. 4Wyoming 2026 Senate forecast: Hageman vs. Byrdfutureballot.com
  5. 5Wyoming Election Results and Maps 2020cnn.com
  6. 6Wyoming Presidential Election Results 2024nytimes.com

5. How do Harriet Hageman's and James Byrd's fundraising totals and cash-on-hand compare according to the latest 2026 FEC filings?

Harriet Hageman Total Receipts$2,678,888.54 (through September 30, 2026) [1][2]
Harriet Hageman Cash on Hand$593,893.90 (as of September 30, 2026) [1][2]
James W. Byrd Total Receipts$41,359.94 (through September 30, 2026) [3][2]
Harriet Hageman significantly outraised James Byrd in the latest FEC filings. Harriet Hageman's campaign reported considerably higher fundraising totals and cash on hand compared to James Byrd, according to the most recent 2026 FEC filings. For the period ending September 30, 2026, Hageman's campaign recorded total receipts of $2,678,888.54 and maintained $593,893.90 in cash on hand. Her disbursements for this period amounted to $2,967,957.68 [1][2]. As of October 22, 2026, the September 30 quarterly report represents the most recent comparable FEC financial snapshot [4][5].
James Byrd's campaign reported substantially lower financial activity and resources. In stark contrast, James W. Byrd's campaign reported total receipts of $41,359.94, with disbursements totaling $38,181.82, and held $4,105.78 in cash on hand through September 30, 2026 [3][2]. This indicates that Hageman's overall fundraising efforts surpassed Byrd's by approximately $2.64 million. Furthermore, she maintained about $589,788 more in cash on hand, which is roughly 145 times Byrd's balance [1][2].
Sources (5)
  1. 1HAGEMAN, HARRIET - Candidate overview | FECfec.gov
  2. 2BYRD, JAMES WILLARD MR. - Candidate overview | FECfec.gov
  3. 3FEC Disclosure Form 3 for Byrd for US Senatedocquery.fec.gov
  4. 4Wyoming Senate Race 2026: Hageman vs. Byrd Money...votelog.org
  5. 52026 General Election Infowyomingpublicmedia.org

6. What low-probability 'black swan' events or candidate-specific developments could plausibly alter the trajectory of Harriet Hageman's campaign before November 3, 2026?

Low-Probability Campaign ShocksPersonal scandal, FEC/legal dispute, health event, Trump endorsement reversal, campaign operational failure [1][2][3][4]
Candidate VulnerabilitiesPublic-land policy stance, alignment with President Trump's positions [1][5][6]
Base-Rate ConstraintsWyoming has not elected a Democratic senator since 1970, state is strongly Republican [1][7][8][5]
Harriet Hageman's campaign trajectory could be altered by several low-probability events. These potential shocks include a significant personal scandal, a dispute with the Federal Election Commission or other legal challenges, a major health event, a reversal of a Donald Trump endorsement, or a critical failure in campaign operations [1][2][3][4]. However, available reporting provides no indication that any of these scenarios are currently in progress [1][2][3][4].
Candidate-specific issues are more likely to narrow Hageman's margin than cause a statewide upset. These issues could include her stance on public lands, which is highly significant to Wyoming voters, or increased scrutiny due to national events, particularly her alignment with former President Trump on policy matters [1][5][6]. However, the campaign operates under exceptionally strong base-rate constraints, given that Wyoming has not elected a Democratic senator since 1970 and is consistently a strong Republican state [1][7][8][5]. Current public evidence does not indicate a competitive general-election environment [1][5].
The most plausible change to Hageman's trajectory is a materially narrower victory, not a loss. This reduced margin could stem from an out-party midterm turnout wave or unusually weak Republican voter participation [9][6]. Additionally, James Byrd could potentially consolidate anti-Hageman voters around public land issues, or a late advertising campaign or key debate moment could shift voter sentiment [9][6].
Sources (9)
  1. 1Election could bring quick changes, Hageman says | Newswyomingnews.com
  2. 2Wyoming Small Businesses Endorse Rep. Harriet...nfib.com
  3. 3AP Decision Notes: What to expect in Wyoming's state...clickorlando.com
  4. 4Hageman's Senate campaign fund is 8 times larger than...newsfromthestates.com
  5. 5Wyoming chooses public lands at the ballot boxwyomingpublicmedia.org
  6. 6Why Harriet Hageman (R) Will Win the Wyoming Senate Race | OddsShopperoddsshopper.com
  7. 7Wyoming Senate Primary Election 2026 Live Resultsnbcnews.com
  8. 8United States Senate election in Wyoming, 2026ballotpedia.org
  9. 9Why James Byrd Will Win the Wyoming Senate Race | OddsShopperoddsshopper.com

7. Is there any public, head-to-head general election polling data available for the Hageman vs. Byrd matchup from reputable pollsters for the 2026 cycle?

Public Polling Data AvailabilityNone available for Hageman vs. Byrd as of October 22, 2026 [1][2]
PoliAgg Hageman Win Probability99% (R+39.7 margin) [1]
Poliwave Hageman vs. Byrd ForecastHageman 72.4%, Byrd 27.6% (Safe Republican) [2]
As of October 22, 2026, public, head-to-head general election polling data from reputable pollsters is not available for the Hageman vs. Byrd matchup in the 2026 election cycle. Both PoliAgg and Poliwave confirm the absence of public polls for this specific race [1][2]. This indicates that official registers do not yet list such polling.
Despite the lack of traditional polling, numerical estimates are provided through model forecasts. PoliAgg projects Harriet Hageman with a 99% win probability and an R+39.7 margin [1]. Similarly, Poliwave forecasts Hageman at 72.4% to James Byrd's 27.6%, categorizing the race as Safe Republican [2].
Prediction market and election site odds also heavily favor Hageman in this contest. Her win probability ranges from approximately 99% to 100% versus about 1% for Byrd [3][4][5][6]. It is important to note that these figures represent market probabilities and model forecasts, not direct head-to-head polling data from reputable pollsters [1][2].
Sources (6)
  1. 1Wyoming Senate 2026 Polls — Byrd vs Hageman — PoliAggpoliagg.com
  2. 2Wyoming Senate Polls and Forecast 2026: Byrd vs Hagemanpoliwave.com
  3. 3Wyoming Senate Winner? 2026 Race Oddskalshi.com
  4. 42026 Wyoming Senate Election: Polls & Odds | Prediction Edgepredictionedge.com
  5. 52026 Wyoming Senate race: James Byrd (D) vs. Harriet Hageman (R)2026election.com
  6. 6Wyoming Senate 2026 — Live Kalshi Oddspredictionmarketspicks.com

8. What are the core platform positions and campaign themes for Democratic candidate James Byrd in the 2026 Wyoming Senate election?

Campaign StancePragmatic, independent Wyoming voice [1][2]
Key IssuesAddressing cost of living and rural healthcare [3][4]
Energy Policy FocusSupports domestic production and diversification, including advanced nuclear [3][5][6][7][1]
James Byrd’s 2026 Wyoming Senate campaign prioritizes pragmatic, independent representation. His platform focuses on being a pragmatic, independent voice for Wyoming, emphasizing bipartisan cooperation and placing state interests above national partisan choices [1][2]. Central campaign themes revolve around addressing the cost of living and strengthening rural healthcare [3][4]. Regarding the cost of living, Byrd proposes cutting waste and red tape, boosting domestic energy production to lower fuel costs, extending prescription drug and insulin caps, offering targeted first-time-homebuyer credits, supporting local housing development, and expanding rural broadband [3][4][1].
Byrd’s platform details healthcare improvements and a balanced energy approach. For rural healthcare, his plans include expanding telehealth reimbursement, stabilizing critical-access hospitals, increasing rural medical residencies, and strengthening loan forgiveness programs for healthcare professionals serving Wyoming communities [4][6][7]. His energy policy supports traditional workers and domestic production while promoting diversification and innovation in areas such as advanced nuclear power, carbon storage, and minerals. This strategy aims for lower energy costs and Wyoming energy independence, highlighted by projects like TerraPower’s Natrium reactor [3][5][6][7][1]. Byrd also advocates for public lands to remain accessible for activities such as hunting and fishing under multiple-use management with local input, opposing their sale or transfer [3][4][6][1].
Beyond core issues, Byrd also addresses broader state and social concerns. Other recurring themes include rural economic resilience, education, veteran support, and common-sense governance [4][8][9]. He also advocates for immigration reforms, specifically mentioning streamlined H-2A/H-2B programs and a fair pathway to citizenship [4][8].
Sources (9)
  1. 1Home | Byrd for Senatebyrdforsenate.com
  2. 2First Wyoming Democrat announces run for U.S. Senatewyomingpublicmedia.org
  3. 3U.S. Senate: James Byrd | Primaryjhnewsandguide.com
  4. 42026-LWVFC-General-Election-Voter-Guide....county10.com
  5. 52026 Wyoming Senate race: James Byrd (D) vs. Harriet Hageman (R)2026election.com
  6. 6James Byrd | U.S. Senate | WyoFile 2026 Election Guideprojects.wyofile.com
  7. 7Interview with James Byrd, Democratic Party candidate for U.S...wyomingpublicmedia.org
  8. 8James Byrd – Wyoming Democratic Partywyodems.org
  9. 9James Byrd, Democrat, U.S. Senate | Candidateswyomingnews.com

9. What Could Change the Odds

Key Catalysts

Market probabilities indicate Harriet Hageman (R) holds an overwhelming lead for Wyoming's open U.S. Senate seat, with Kalshi showing 100% and Polling Forecast 98% as of October 22, 2026 [1][2]. Polymarket implies a 99% probability for Republicans to win the race [3]. Given the market's near 99-100% positioning, positive news for Hageman or Republicans likely has limited upside [1][4][3][2][5][6][7]. However, adverse surprises could generate larger percentage moves [1][4][3][2][5][6][7]. Current forecasts rely heavily on fundamentals because no nominee-matched general-election poll is available [2][6][7].
Potential catalysts prior to the November 3, 2026 general election include Republican or Hageman campaign news, credible nominee-matched polling, and releases of fundraising and spending data [1][4][3][2][5][6][7]. Shifts in the national Senate environment, turnout and early-vote indicators, debates, or major endorsements could also influence market probabilities [1][4][3][2][5][6][7]. On election night, county returns will serve as a direct catalyst [1][4][3][2][5][6][7]. Bearish tail risks for Hageman include an unusually large polling or model miss, a national Democratic wave, campaign problems or scandal, or unexpected turnout changes [2][6][7].

Key Dates & Catalysts

  • Expiration: November 03, 2027
  • Closes: November 03, 2027
Sources (7)
  1. 1Wyoming Senate Winner? 2026 Race Oddskalshi.com
  2. 2Wyoming Senate: 2026 forecast | Polling Forecastpollingforecast.com
  3. 3https://polymarket.com/event/wyoming-senate-election-winner/will-the-republicans-win-the-wyoming-senate-race-in-2026polymarket.com
  4. 42026 Wyoming Senate Election: Polls & Odds | Prediction Edgepredictionedge.com
  5. 5November 3, 2026: Wyoming Senate winner Prediction Marketrobinhood.com
  6. 6Wyoming Senate forecast 2026: James Byrd vs Harriet Hageman | On Point Politicsonpointpolitics.us
  7. 7Wyoming Senate 2026: Hageman >99 in 100 · R+33.2 forecast | Hageman vs. Byrd polls & odds — Call the Mapcallthemap.com