Arizona's 4th District margin of victory
Short Answer
Both the model and the market overwhelmingly agree that Democrats will win Arizona's 4th District by 4 or more points, with only minor residual uncertainty.
1. Market Behavior & Drivers
This market has experienced a dramatic and rapid upward trend, moving from a starting price of 2.0% to its current level of 90.5%. The most significant price action occurred over two days, with a spike from 16.0% to 50.0% on May 06, 2026, followed immediately by another large jump from 50.0% to 90.5% on May 07, 2026. However, the available context does not identify a specific news event or fundamental driver that would account for these sharp movements. Since this steep ascent, the price has stabilized, establishing a firm plateau at the 90.5% level which now acts as a point of strong consensus.
The total trading volume of 1,819 contracts suggests a moderate level of activity, likely concentrated during the period of rapid price adjustment. The recent data points show zero volume, indicating that conviction among traders is currently very high at the 90.5% price, with little new trading activity to challenge this level. This lack of recent volume suggests the market has priced in the available information and reached a stable equilibrium.
Overall, the chart reflects an overwhelming market sentiment that the Democratic candidate will win Arizona's 4th District by a margin of four points or more. The current price of 90.5% is consistent with external data points, such as the district's Cook Partisan Voting Index of D+4 and a previous election margin of 7.2 percentage points. The market's rapid repricing and subsequent stability at a high probability suggest traders have a strong conviction in a decisive Democratic victory.
- National political trends in 2026 are expected to benefit Democrats.
- President Trump's reported low job approval in 2026 may benefit Democrats.
- Incumbent Greg Stanton significantly outpaces a leading Republican in fundraising.
- Arizona's 4th District exhibits a moderate Democratic lean (D+4 PVI).
- A competitive Democratic primary could reduce the party's general election margin.
- The Democratic margin of victory decreased between 2022 and 2024.
Who Wins and Why
| Outcome | Market | Model | Why |
|---|---|---|---|
| Democrats, 25+ pts | 14.0% | 14.3% | National political trends are expected to significantly benefit Democrats, widening their margin of victory. |
| Democrats, 4+ pts | 90.5% | 89.1% | National political trends are expected to significantly benefit Democrats, widening their margin of victory. |
| Democrats, 28+ pts | 9.6% | 10.0% | National political trends are expected to significantly benefit Democrats, widening their margin of victory. |
| Democrats, 16+ pts | 45.0% | 43.0% | National political trends are expected to significantly benefit Democrats, widening their margin of victory. |
| Democrats, 22+ pts | 22.0% | 21.9% | National political trends are expected to significantly benefit Democrats, widening their margin of victory. |
Current Context
Arizona's 4th Congressional District strongly favors Democratic representation and incumbent. The district is consistently rated "Solid Democratic" with a Cook Partisan Voting Index (PVI) of D+4 [1], and the last election resulted in a margin of victory of 7.2 percentage points, or 24,376 votes [2]. Democratic incumbent Greg Stanton is seeking re-election. Current projections underscore this Democratic lean; The Hill and DDHQ's model forecasts a 91% chance of Greg Stanton winning [3], while Polymarket, as of May 9, 2026, indicates an 81.5% probability for the Democratic Party to win the general election, with the Republican Party at 19% [4]. This forecast is primarily attributed to Stanton's incumbency advantage, the district's strong Democratic lean, and a crowded Republican primary field [4]. Although some selling pressure on Democratic contracts has been observed, it is largely considered a reflection of broader national trends rather than a significant shift in local dynamics [4]. Prediction markets on Kalshi also offer active markets for various Democratic/Republican margin outcomes, including margins of 16 points or more [5].
Both parties face primary challenges ahead of key election dates. Democratic incumbent Greg Stanton will face a primary challenge from progressive activist Kai Newkirk [4][6]. On the Republican side, the primary field includes Jerone Davison, Zuhdi Jasser, Bradley Honer, Elizabeth Reye, and Alex Stovall [4][6]. Key dates for the election cycle are approaching: the Voter Registration Deadline for the Primary Election is June 22, 2026 [7][8][9][10], with Early Voting for the Primary beginning on June 24, 2026 [7][9][10]. Primary Election Day is scheduled for July 21, 2026 [11][7][8][9][10]. Looking ahead to the general election, the Voter Registration Deadline is October 5, 2026 [7][8], and General Election Day is November 3, 2026 [11][7][8][4].
2. Price Chart
Historical Price (Probability)
Outcome probability
Date
3. Significant Price Movements
Notable price changes detected in the chart, along with research into what caused each movement.
Outcome: Democrats, 4+ pts
📈 May 07, 2026: 40.5pp spike
Price increased from 50.0% to 90.5%
What happened: The available research does not identify a specific primary driver for a 40.5 percentage point spike in the "Democrats, 4+ pts" outcome for Arizona's 4th District on May 07, 2026 [1]. No district-specific evidence of social media activity, official announcements, or market structure factors accounting for such a significant movement was found [1][2][3]. While a general NPR poll released on May 06, 2026, indicated declining Trump approval and broader Democratic gains in midterm polling, this was not specific to Arizona's 4th District or sufficient to explain a 40.5 percentage point shift in this specific market [3]. Therefore, social media appears to be irrelevant as a primary driver, and the cause of this reported movement remains unverified by the provided sources.
Outcome: Democrats, 7+ pts
📈 May 06, 2026: 71.0pp spike
Price increased from 10.0% to 81.0%
What happened: The provided research does not contain information regarding a 71.0 percentage point spike in the "Arizona's 4th District margin of victory" prediction market [2]. The available source details the 2026 election dates for Arizona's 4th Congressional District but explicitly states it does not include any market metrics or information about the reported price movement or its cause [2]. Therefore, there is insufficient evidence to identify the primary driver, social media activity, or any other factor contributing to the movement. Social media's role in this specific market event cannot be determined.
4. Market Data
Contract Snapshot
This market resolves to Yes if the Democratic Party wins the 2026 U.S. House election in Arizona's 4th District by 16 percentage points or more; otherwise, it resolves to No. The margin is calculated as the Democratic Party's vote percentage minus the next highest candidate's percentage, with no rounding. The market opened on May 5, 2026, and will close early upon publication of certified election results or by November 3, 2027, with payouts projected 30 minutes after closing, verified by official election authorities.
Available Contracts
Market options and current pricing
| Outcome bucket | Yes (price) | No (price) | Last trade probability |
|---|---|---|---|
| Democrats, 4+ pts | $0.91 | $0.10 | 91% |
| Democrats, 13+ pts | $0.64 | $0.44 | 62% |
| Democrats, 16+ pts | $0.46 | $0.63 | 45% |
| Democrats, 19+ pts | $0.32 | $0.71 | 32% |
| Democrats, 22+ pts | $0.22 | $0.79 | 22% |
| Democrats, 25+ pts | $0.24 | $0.86 | 14% |
| Democrats, 28+ pts | $0.15 | $0.93 | 10% |
| Democrats, 10+ pts | $0.75 | $0.33 | 0% |
| Democrats, 7+ pts | $0.86 | $0.22 | 0% |
Market Discussion
In the 2024 Arizona 4th District general election, Greg Stanton (D) received 52.7% of votes compared to Kelly Cooper (R)'s 45.5%, resulting in a 7.2-point margin of victory for Stanton [1]. Prediction markets reflect this trend, with the Democratic Party currently favored at 88% to win the AZ-04 House Election Winner market [2].
5. Trust Index
Order book is critically thin.
Primary risk· Trade quality
How it adds up
Integrity80% of score92Strong
Trade quality20% of score39High Risk
Includes the cost to trade: a $1,000 order can't be filled here because the order book is too thin.
Trust score81Good
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
6. What national political trends or shifts in presidential approval could impact the final Democratic margin of victory in Arizona's 4th District by November 2026?
| Trump Job Approval | Approximately 39% (April 2026) [1][2] |
|---|---|
| Trump Price Approval | Net approval -46 (April 2026) [2][3] |
| AZ-04 Cook PVI | D+4 (last updated Nov 17, 2025) [4][5] |
National political trends indicate that President Trump’s low job approval in 2026 could significantly impact the Democratic margin of victory in Arizona's 4th District by November 2026 [2][6][3]. This weak presidential approval environment is reported to darken Republican midterm prospects, potentially helping Democrats gain or widen margins [2][3].
President Trump’s approval ratings remained low throughout early 2026, generally around the high-30s to low-40s, with declining sentiment [2][6]. Specific figures include approximately 35% approval in a late-April 2026 poll and about 37% approval in late-January 2026 [2][6]. Issue-based ratings were also low, notably a net approval of -46 on prices in April 2026, which is linked to a Democratic advantage on the generic ballot [2][3]. Furthermore, Pew reports that support for Trump’s policies and plans fell to about 27% of Americans supporting all or most, alongside an increase to 82% of Democrats wanting congressional leaders to stand up to Trump, suggesting national political momentum currently favors Democrats [6].
Historical trends suggest a structural tailwind for Democrats in districts like AZ-04. A generic midterm environment analysis notes that when a president’s approval is below 50%, and particularly below 45%, the president’s party historically loses additional House seats [1]. With President Trump reported at approximately 39% approval in April 2026, this indicates a structural tailwind for Democrats that could expand their margin in a Democratic-leaning seat such as AZ-04 [1][2]. The Cook Political Report, last updated November 17, 2025, rates AZ-04 as D+4 (Cook PVI), implying that negative national presidential approval shifts for Republicans are more likely to increase the Democratic margin in AZ-04 than merely prevent a collapse for the November 4, 2026 midterm election outcome [4][5].
Sources (6)
- 1Republican Midterm Strategy: Holding the House in 2026 | USPollingData.comuspollingdata.com
- 2Trump approval falls to 35% as rating on handling prices hits a record -46gelliottmorris.com
- 3GOP midterm prospects darken as Trump approval falls | Brookingsbrookings.edu
- 4AZ-04 2026 - Cook Political Reportcookpolitical.com
- 5AZ-04 House Election Winner Predictions & Odds | Polymarketpolymarket.com
- 6Confidence in Trump Dips in 2026, and Fewer Now Say They Support His Policies and Plans | Pew Research Centerpewresearch.org
7. How does incumbent Greg Stanton's 2026 cycle fundraising compare to the leading Republican primary candidates like Zuhdi Jasser and Jerone Davison?
| Greg Stanton 2026 Cycle Receipts | $1,663,223.09 (Jan 1, 2025–Mar 31, 2026) [1] |
|---|---|
| Jerone Davison 2026 Cycle Receipts | $1,358.15 (Jan 1, 2025–Jun 30, 2025) [2] |
| Zuhdi Jasser Quarterly Fundraising | $82,913 [3] |
Incumbent Greg Stanton significantly outpaces Jerone Davison in 2026 cycle fundraising. For the 2026 election cycle, incumbent Greg Stanton has reported considerably higher fundraising compared to Republican primary candidate Jerone Davison. Stanton's campaign reported total receipts of $1,663,223.09 and total disbursements of $847,123.33 for the period from January 1, 2025, to March 31, 2026 [1]. In contrast, Jerone Davison's 2026 cycle committee recorded total receipts of $1,358.15 with no disbursements for the coverage period from January 1, 2025, to June 30, 2025 [2].
Zuhdi Jasser's precise 2026 FEC fundraising data is not readily available. Specific 2026-cycle fundraising figures for Zuhdi Jasser based on FEC receipts are not explicitly provided in the available data [4]. However, an alternative source indicates different quarterly committee fundraising amounts, reporting M. Zuhdi Jasser raising $82,913 and Jerone Davison raising $102,516 [3]. This same source also estimated Greg Stanton's spending or overall race spend at $2.37 million over the last two years, though it notes this metric is distinct from FEC receipts [3].
8. What demographic trends and voter registration statistics in Arizona's 4th District underpin its Cook Partisan Voting Index rating of D+4?
Arizona's 4th Congressional District exhibits a moderate Democratic lean, holding a Cook Partisan Voting Index (Cook PVI) rating of D+4. This indicates that its two-party presidential vote share is approximately two points more Democratic than the national average, with the 2025 PVI relying on 2020 and 2024 presidential election results [1][2][3]. The district's lean is fundamentally shaped by its predominantly urban character and the composition of its voter registration [5][6]. With a population of 793,264, the district is overwhelmingly urban, as about 99.92% of its residents are classified as such, and the median age is 36.2 [4][5]. Demographically, the district's racial and ethnic composition includes approximately 55.2% White residents and 26.7% Hispanic residents [4].
Voter registration statistics underscore the district's competitive political landscape. Statewide voter registration data for Arizona, as of January 2025, shows Republicans leading with 35.93%, followed by Democrats at 28.89%, and a substantial 33.59% registered as 'Other' [7]. More specifically within Maricopa County's Congressional District 4, live registration totals reveal 132,060 active Republican voters versus 122,185 active Democratic voters, alongside a meaningful presence of 'Other' registered voters [6]. This specific balance of registrations, particularly the large non-Democratic bloc observed statewide, is consistent with the district's moderate Democratic lean of D+4, rather than suggesting a more decisively Democratic status [7][6].
Sources (7)
- 1AZ-04 2026 - Cook Political Reportcookpolitical.com
- 2The Cook Partisan Voting Index (Cook PVI℠) | Cook Political Reportcookpolitical.com
- 3The 2025 Cook Partisan Voting Index (Cook PVI℠) | Cook Political Reportcookpolitical.com
- 4Congressional District 4, AZ - Profile data - Census Reportercensusreporter.org
- 5Arizona's 4th congressional districten.wikipedia.org
- 6Maricopa County Voter Registration Totalsrecorder.maricopa.gov
- 7Voter Registration Statisticsazsos.gov
9. How might the outcome of the July 21 Democratic primary between Greg Stanton and Kai Newkirk influence the forecasted margin of victory in the general election?
| Democratic Presidential Advantage | +4% (past two presidential elections) [1][2][3] |
|---|---|
| Independent Voter Share | Approximately 36% [1] |
| District Rating | Solidly Democratic [1][2] |
The outcome of the July 21 Democratic primary between Greg Stanton and Kai Newkirk could reduce the party's general election margin of victory. Should challenger Kai Newkirk defeat incumbent Greg Stanton, it might narrow the forecasted Democratic advantage in Arizona’s 4th Congressional District, although Republicans are not expected to flip the seat [2][1][3]. While the district is considered "solidly" Democratic, rather than "overwhelmingly," Democrats have historically held a +4% advantage in the past two presidential elections in this district [1][2]. However, Stanton’s own general-election margins have narrowed in recent cycles, indicating a potential vulnerability [1][2][3].
Prediction markets would assess the primary nominee's ability to maintain broad coalition support among voters. Market analysis would consider whether a perceived ideological mismatch or a bruising primary might motivate higher GOP or anti-Democratic turnout, or diminish crucial independent support [1]. Independent voters represent the largest segment of the electorate in the district, accounting for approximately 36% of the voter share [1]. Any factor that could depress turnout or independent backing, such as a contentious primary or a nominee failing to resonate widely, has the potential to narrow the general election margin [1].
10. What Could Change the Odds
Key Catalysts
The Democratic Party is currently priced at an 87% implied probability in the AZ-04 “House Election Winner” market, compared to 13% for the Republican Party, with market resolution on/around Nov 3, 2026 [1]. This follows a shift in the Democratic margin, which was +12.2 percentage-points in the 2022 U.S. House race and +7.2 percentage-points in the 2024 race [2][3].
Upcoming electoral milestones include the 2026 AZ-04 filing deadline on March 23, 2026 [4], followed by the primary election on July 21, 2026 [4]. The general election is set for Nov 3, 2026 [4]. These dates represent points where candidate fields will be finalized and initial campaign narratives established, potentially shifting market probabilities.
A significant period for market expectations will be the early voting dates for 2026 AZ-04, spanning from June 24–July 17, 2026 [5][6]. This window is identified as a practical time when late campaign momentum can emerge within the electorate and begin to influence prediction-market expectations [5][6].
Key Dates & Catalysts
- Expiration: November 03, 2027
- Closes: November 03, 2027
Sources (6)
- 1AZ-04 House Election Winner Predictions & Odds | Polymarketpolymarket.com
- 2Arizona U.S. House - District 4 Election Results | The Arizona Republicazcentral.com
- 3Arizona 4th District election results 2024 live updates | The Washington Postwashingtonpost.com
- 4Arizona's 4th Congressional District election, 2026 - Ballotpediaballotpedia.org
- 5Arizona's 4th Congressional District election, 2026 (July 21 Republican primary) - Ballotpediaballotpedia.org
- 6Arizona's 4th Congressional District election, 2026 (July 21 Democratic primary) - Ballotpediaballotpedia.org
