Arizona's 4th District margin of victory
Short Answer
Both the model and the market overwhelmingly agree that Democrats, 4+ pts is most likely, with only minor residual uncertainty.
1. Executive Verdict
- Significant national Democratic lead noted in early May 2026 poll.
- District classified as 'Solid Democratic' with a D+4 Cook PVI.
- Incumbent Greg Stanton holds significant financial advantage over challenger Kai Newkirk.
- National political trends in mid-2026 may influence voter turnout.
- Greg Stanton achieved strong margins of victory in 2020 and 2022 elections.
- No head-to-head polling data is currently available for the district.
Who Wins and Why
| Outcome | Market | Model | Why |
|---|---|---|---|
| Democrats, 25+ pts | 14.0% | 16.4% | A significant national Democratic lead and higher enthusiasm suggest a favorable environment for the incumbent. |
| Democrats, 4+ pts | 90.5% | 90.5% | A significant national Democratic lead and higher enthusiasm suggest a favorable environment for the incumbent. |
| Democrats, 28+ pts | 9.5% | 11.4% | A significant national Democratic lead and higher enthusiasm suggest a favorable environment for the incumbent. |
| Democrats, 16+ pts | 45.0% | 46.9% | A significant national Democratic lead and higher enthusiasm suggest a favorable environment for the incumbent. |
| Democrats, 22+ pts | 23.0% | 25.8% | A significant national Democratic lead and higher enthusiasm suggest a favorable environment for the incumbent. |
Current Context
Arizona's 4th District currently holds a strong Democratic lean. The district is rated as Solid Democratic by Cook Political Report and Inside Elections [^], with a Cook Partisan Voting Index of D+4 based on 2024 and 2020 presidential results [^][^]. In the 2024 election, Representative Stanton (D) secured re-election with 52.7% of the vote (176,428 votes) against Cooper (R), who received 45.5% (152,052 votes). This resulted in a victory margin of 7.2 percentage points, or 24,376 votes [^][^][^][^].
The 2026 election features contested primaries for both parties. The filing deadline for candidates is March 23, 2026, with primaries set for July 21, 2026, leading to the general election on November 3, 2026 [^][^]. Incumbent Representative Stanton is challenged in the Democratic primary by progressive activist Kai Newkirk [^]. For the Republican primary, candidates include Jerone Davison, Zuhdi Jasser, Bradley Honer, Elizabeth Reye, and Alex Stovall [^][^]. Prediction markets, such as Polymarket, currently indicate a high probability of a Democratic hold, estimated at 87-88% [^]. A recent poll also showed Stanton with a significant lead, 54-37%, over a prospective Republican nominee, Dave Giles [^].
2. Market Behavior & Price Dynamics
Historical Price (Probability)
Outcome probability
Date
This prediction market experienced a dramatic and rapid upward trend over a short period. The price for a Democratic victory of 4 or more points began at a low of 2.0% before undergoing two significant spikes. On May 6, the probability jumped 34.0 percentage points from 16.0% to 50.0%. This was followed by an even larger 40.5 percentage point spike on May 7, bringing the price to its current level of 90.5%. The market has since stabilized at this high, suggesting it has become a new resistance level.
The initial surge to 50.0% appears to be driven by external news. Context suggests the release of a national poll showing a strong D+10 lead on the generic ballot may have prompted traders to re-evaluate the likelihood of a strong Democratic performance in this district. However, the subsequent and larger spike to 90.5% lacks a clear catalyst based on available information. The trading volume of 1,446 contracts is moderate, but the provided data points show zero volume during the days of these major price changes, which could suggest the shifts were caused by a small number of trades or market maker adjustments rather than broad market participation.
Overall, the chart indicates a swift and decisive shift in market sentiment. Traders have moved from pricing a wide Democratic victory as highly unlikely to viewing it as nearly certain. This strong conviction, reflected in the 90.5% price, aligns with the district's Cook Partisan Voting Index of D+4 and its 'Solid Democratic' rating. The price action suggests the market now fully expects the Democratic candidate to win by a margin consistent with, or greater than, the district's underlying partisan lean.
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: No primary driver for the 40.5 percentage point spike in the "Democrats, 4+ pts" outcome on May 7, 2026, could be identified from the available information. Web research, including specific queries for social media and news catalysts related to the '2026-05-07 spike 40.5pp', yielded no matching results for Arizona's 4th District [^]. Furthermore, no election results were available for May 7, 2026, as primary elections are scheduled for July and August 2026 [^]. Based on the provided data, social media was not an identifiable primary driver for this market movement.
Outcome: Democrats, 7+ pts
📈 May 06, 2026: 71.0pp spike
Price increased from 10.0% to 81.0%
What happened: The primary driver of the 71.0 percentage point spike appears to be the release of a national NPR/Marist poll on May 6, 2026, which indicated a significant D+10 lead (52-42%) on the generic ballot nationwide [^]. This strong national Democratic performance likely prompted a dramatic re-evaluation of the "Democrats, 7+ pts" outcome for Arizona's 4th District, where Democrats had previously won by 7.3 percentage points in 2024 [^][^][^]. No specific social media activity, key posts, or district-specific news correlating with the 71.0 percentage point surge was found [^]. Therefore, social media was irrelevant as a primary driver.
4. Market Data
Contract Snapshot
This market resolves to YES if the Democratic Party wins the 2026 U.S. House of Representatives 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, and verified by official election authorities. The market, which opened May 5, 2026, will close upon certified election results or by November 3, 2027, with projected payouts 30 minutes after closing.
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 | $0.62 | $0.39 | 62% |
| Democrats, 16+ pts | $0.46 | $0.55 | 45% |
| Democrats, 19+ pts | $0.32 | $0.69 | 31% |
| Democrats, 22+ pts | $0.22 | $0.79 | 23% |
| Democrats, 25+ pts | $0.15 | $0.86 | 14% |
| Democrats, 28+ pts | $0.10 | $0.91 | 10% |
| Democrats, 10+ pts | $0.73 | $0.28 | 0% |
| Democrats, 7+ pts | $0.82 | $0.19 | 0% |
Market Discussion
Greg Stanton (D) won Arizona's 4th Congressional District election with a margin of 24,376 votes, representing 7.2 percentage points [^][^][^][^][^]. Pre-election, Polymarket indicated an 87% probability of a Democratic win for the seat, citing Stanton's leads in polls and fundraising efforts [^][^]. There was no high-volume public discussion specifically regarding the margin of victory, with attention largely focused on broader Arizona races [^][^][^].
5. What is the likely impact of the July 2026 Republican primary outcome on Greg Stanton's general election margin?
| Incumbent's 2024 Win Margin | 7.3% [^][^] |
|---|---|
| District Partisan Lean | D+4 [^][^] |
| Polymarket Dem Win Chance (2026) | 87% [^][^] |
Democratic incumbent Greg Stanton likely to retain Arizona's 4th District seat. A Democratic hold in Arizona's 4th District is widely anticipated, despite the potential influence of the Republican primary outcome on Greg Stanton's general election margin [^][^][^]. The incumbent secured a 7.3% victory in 2024, and the district has a Democratic lean of D+4 [^][^]. Historically, Stanton has also demonstrated superior fundraising capabilities compared to his previous opponents [^].
A stronger Republican primary winner could reduce Stanton's victory margin. The Republican primary in July 2026 features candidates such as Davison, who reported $3.8k in cash on hand, and Jasser, who held $290k as of December 2025 [^][^]. A more robust GOP nominee, like Jasser, is projected to narrow Stanton's general election victory margin by 2-5 points when compared to a weaker candidate such as Davison [^]. However, even with a stronger Republican contender, the district is still expected to remain a Democratic stronghold, and no polls have been released since the primary filing [^].
Prediction markets strongly indicate a high probability of Democratic victory. Prediction markets reinforce the high probability of a Democratic win in the 2026 election for Arizona's 4th District. Polymarket indicates an 87% chance of a Democratic victory, implying an approximate 13-point margin, while Kalshi suggests a 90% chance, translating to an estimated 18-point margin [^][^].
6. What voter registration trends and demographic data underpin the 'Solid Democratic' rating for Arizona's 4th District?
| AZ-04 Cook PVI | D+4 [^][^][^] |
|---|---|
| 2024 House Election Margin (AZ-04) | 7.3% (24k votes) [^] |
| AZ-04 Active Voter Registration Lead | "Other" 35.1% [^] |
Arizona's 4th District maintains a strong Democratic political leaning. It is officially classified as 'Solid Democratic' with a Cook Partisan Voting Index (PVI) of D+4, a rating consistent with Democratic presidential candidate leads in both the 2024 and 2020 elections [^][^][^]. This political trend was further confirmed in the 2024 House election, where the Democratic incumbent secured 52.7% of the vote (176,000 votes) compared to the Republican challenger's 45.5% (152,000 votes), resulting in a significant 7.3% margin of victory [^].
Demographics and district-level registration show a diverse voter landscape. The district has a population of 793,000, is almost entirely urban at 99.9%, and has a median income of $82,000 [^][^]. Among the 403,000 active voters in AZ-04, a plurality, 35.1%, are registered as "Other," followed by 32.8% registered Republicans, and 30.3% registered Democrats [^].
Broader state and county data reveal differing voter registration trends. Statewide figures for Arizona in January 2025 indicated that Republicans held a registration advantage [^]. Within Maricopa County, which encompasses much of AZ-04, the Republican registration lead over Democrats expanded to 191,000 by April 2025 [^].
7. How do incumbent Greg Stanton and primary challenger Kai Newkirk compare on fundraising and key policy platforms?
| Greg Stanton Cash on Hand | $1.8 million (as of Q1 2026) [^] |
|---|---|
| Kai Newkirk Cash on Hand | $0 (FEC processing pending) [^] |
| AZ-04 District Rating | Solid Democratic by Cook PVI [^] |
Incumbent Greg Stanton holds a significant financial advantage over challenger Kai Newkirk. Stanton, running in Arizona's 4th Congressional District (AZ-04), reported an estimated $1.8 million cash on hand as of the first quarter of 2026 and accepts contributions from PACs, including leadership funds [^]. In contrast, his primary challenger, Kai Newkirk, has reported $0, with FEC processing pending for his campaign [^]. Newkirk emphasizes a grassroots campaign, stating his rejection of corporate PACs, AIPAC, and billionaire Super PACs [^][^][^]. Newkirk launched his campaign in March 2026 and is considered a longshot contender for the Democratic primary scheduled for July 21, 2026 [^].
Key policy disputes include immigration and support for Israel. The primary contest highlights differences on issues such as the Laken Riley Act vote and defunding ICE, alongside varying stances on support for Israel [^][^][^]. The AZ-04 district, encompassing East Valley areas like Tempe, Mesa, and Chandler, is rated as solid Democratic by Cook PVI [^]. Early 2026 Polymarket odds indicate an 87% probability for the Democratic party to win the House seat in the general election [^].
8. What public polling data is available for the head-to-head matchup between Greg Stanton and the Republican nominee post-primaries?
| District Lean (Cook PVI) | D+4 [^][^] |
|---|---|
| Democrat Win Probability (Polymarket) | 88% [^] |
| Greg Stanton Cash on Hand | $1.6 million (as of March 2026) [^] |
No head-to-head polling data is currently available for Arizona's 4th District. There is no specific public polling data for a head-to-head matchup between incumbent Greg Stanton and any potential Republican nominee for the 2026 general election [^][^]. Arizona's 4th Congressional District is considered to have a Cook Partisan Voting Index (PVI) lean of D+4 [^][^]. The Republican primary for this district is scheduled for July 21, 2026, with candidates including Jerone Davison, Bradley Honer, Zuhdi Jasser, Elizabeth Reye, and Alex Stovall [^][^].
Prediction markets favor a Democratic victory in Arizona's 4th District. According to Polymarket, the implied probability of a Democrat winning AZ-04 stands at 88%, while Republicans currently hold a 13% chance [^]. Regarding campaign finances, Greg Stanton reported $1.6 million cash on hand as of March 2026 [^].
9. How might national political trends in mid-2026 influence voter turnout and the final margin in this district?
| Trump Net Approval (Economy) | -21 (April 2026) [^] |
|---|---|
| Democratic Enthusiasm | 73% [^] |
| AZ-04 Democratic Hold Probability | 87% (Polymarket) [^] |
National political trends likely affect voter turnout and enthusiasm. Mid-2026 national political trends, including President Trump's -21 net approval for his economic performance in April 2026 and gas prices at $3.84 per gallon attributed to the Iran war, are projected to significantly influence voter turnout and election results [^][^]. Democratic enthusiasm is notably high at 73%, contrasting with Republican enthusiasm at 52% [^]. This enthusiasm disparity is expected to contribute to a projected overall turnout of 47-52%, a figure consistent with the 49.3% turnout observed in the 2018 midterm elections [^][^]. Historically, Republican midterm turnout has tended to be weak [^].
Arizona's 4th Congressional District shows strong Democratic leanings. Arizona's 4th Congressional District (AZ-04), with a Cook PVI of D+4, demonstrates a strong Democratic leaning [^][^]. The incumbent Democrat, Stanton, secured victories with a 12% margin in 2022 and a 7% margin in 2024 [^][^]. Current projections from Polymarket indicate an 87% probability that the Democratic party will retain control of AZ-04 [^]. The district's primaries are scheduled for July 21, 2026, featuring Democratic candidates Stanton and Newkirk, alongside five Republican candidates, including Jerone Davison [^][^].
10. What Could Change the Odds
Key Catalysts
The district's D+4 Cook PVI indicates a Democratic lean [^] . Current market probabilities from early 2026 show an 87% likelihood for a Democratic win and 13% for the GOP on Polymarket [^]. Representative Stanton has strong past margins, winning with 63% in 2022 and 59% in 2020 [^]. Kalshi also maintains an active market for Democratic/Republican margin bins, including those for 16+ points [^]. These current conditions establish a baseline for potential shifts.
Key catalysts for changes in market probability include upcoming election dates and fundraising activities. The primary election is scheduled for July 21, 2026, followed by the general election on November 3, 2026 [^]. These dates represent critical junctures for the race. Additionally, fundraising efforts, such as Representative Stanton's reported $363k raised quarterly and $1.83M cash on hand [^], can indicate shifts in campaign strength and draw, potentially impacting the probabilities.
Key Dates & Catalysts
- Expiration: November 03, 2027
- Closes: November 03, 2027
11. Decision-Flipping Events
- Trigger: The district's D+4 Cook PVI indicates a Democratic lean [^] .
- Trigger: Current market probabilities from early 2026 show an 87% likelihood for a Democratic win and 13% for the GOP on Polymarket [^] .
- Trigger: Representative Stanton has strong past margins, winning with 63% in 2022 and 59% in 2020 [^] .
- Trigger: Kalshi also maintains an active market for Democratic/Republican margin bins, including those for 16+ points [^] .
13. Historical Resolutions
No historical resolution data available for this series.
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