Polymarket Build Your Map: Predictions, Best Bets for Closest Midterm Senate Races on Election Night
The 2026 midterm elections will determine control of the U.S. Senate, with seven competitive races offering an opportunity to combine multiple election outcomes into one prediction-market parlay. Can Democrats flip traditionally Republican states like Texas and Alaska while Republicans preserve key seats in the Midwest and Northeast? Check out these seven Polymarket Build Your Own Map best picks for Tuesday, November 3.
Peter Alexis - November 3, 2026, 3:55 PM EST
4 Minute ReadPolymarket Build Your Own Map Best Picks: 7-Leg Senate Parlay for November 3
Polymarket's Build Your Own Map feature allows traders to combine the outcomes of seven closely watched Senate elections into a single position, with all seven selections required to win for the ticket to pay out. The featured combination includes Democratic victories in Texas, Michigan, Ohio and Alaska, alongside Republican victories in Maine, Iowa and Kansas, producing a potential $331.43 payout on a $10 investment.
The seven races have experienced significant market movement throughout the final weeks of the midterm campaign, particularly as Democrats have gained ground in traditionally Republican states. While the four Democratic selections carry market-implied chances above 70%, the three Republican selections go against current market pricing, creating a considerably higher payout and greater overall risk.
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Polymarket Build Your Own Map: 7 Best Picks for the 2026 Senate Elections
Leg 1: Texas Senate, James Talarico (D) at 76%
Texas represents one of the most consequential outcomes on the seven-race map, with Democrat James Talarico priced at 76% against Republican Ken Paxton. The Democratic state representative has benefited from a tightening political environment and concerns surrounding Paxton's controversies, with several late polls showing a competitive race despite Texas voting for Donald Trump by approximately 14 percentage points in 2024.
A Talarico victory would mark the first time Texas has elected a Democratic U.S. senator since 1988, delivering a major change in the state's congressional representation. The market's substantial Democratic pricing contrasts with decades of Republican strength, making Texas one of the most significant components of the proposed Senate map.
Leg 2: Michigan Senate, Abdul El-Sayed (D) at 81%
Michigan's Senate election features Democrat Abdul El-Sayed against Republican Mike Rogers, with El-Sayed carrying an 81% market-implied chance entering Election Day. Recent polling has placed the Democrat ahead by approximately five percentage points on average, although individual surveys have shown narrower margins in a state Trump carried in 2024.
El-Sayed's campaign has emphasized healthcare, affordability and progressive economic policies, while Rogers has highlighted national security and his previous congressional experience. Michigan is particularly important because Democrats currently hold the seat, meaning this selection would preserve an existing Democratic position rather than produce an additional pickup.
Leg 3: Ohio Senate, Sherrod Brown (D) at 72%
Former Democratic Sen. Sherrod Brown is priced at 72% against Republican incumbent Jon Husted in Ohio's special Senate election. Brown has maintained a relatively stable prediction-market advantage throughout October, despite losing his previous Senate reelection campaign in 2024 and competing in a state that has shifted substantially toward Republicans.
The late polling average has shown Brown ahead by approximately three points, significantly narrower than the prediction-market split. His longstanding relationships with organized labor and working-class voters remain important to the contest, while Ohio's recent Republican voting patterns and turnout in conservative counties could affect the final margin.
Leg 4: Alaska Senate, Mary Peltola (D) at 72%
Alaska's Senate race features former Democratic Rep. Mary Peltola challenging Republican incumbent Dan Sullivan, with Peltola priced at 72% in the election market. Her previous success in statewide congressional elections and Alaska's distinctive electoral system have contributed to an unusual contest in a state that generally supports Republican presidential candidates.
Alaska uses ranked-choice voting, meaning the eventual result can depend on how lower-ranked preferences transfer between candidates if no one receives an outright majority of first-choice votes. Peltola's support among independents and Alaska Native communities, alongside Sullivan's established Republican coalition, makes the final distribution of preferences particularly important.
Leg 5: Maine Senate, Susan Collins (R) at 26%
Maine represents the most contrarian selection on the ticket, with Republican incumbent Susan Collins priced at just 26% against Democratic challenger Troy Jackson. Collins is seeking a sixth term and has historically demonstrated an ability to attract independent and Democratic voters, although recent polling has generally placed Jackson ahead by approximately three to five percentage points.
Collins has survived difficult reelection contests before, including her 2020 victory over Sara Gideon despite considerable national attention and unfavorable polling. Her established statewide reputation and history of crossover support provide important context for the Republican selection, but the low market-implied chance makes Maine one of the largest contributors to the ticket's overall payout.
Leg 6: Iowa Senate, Ashley Hinson (R) at 47%
Iowa's Senate election is among the closest races in prediction-market pricing, with Republican Ashley Hinson carrying a 47% market-implied chance against Democrat Josh Turek. The contest has tightened considerably during the closing weeks, with Turek briefly moving ahead in market pricing as both campaigns compete for independent and working-class voters.
Hinson's experience representing northeast Iowa in Congress and the state's recent Republican voting history remain important factors in the contest. However, Turek's campaign has attracted significant attention, and late polling has shown conflicting results, making Iowa a particularly sensitive leg in the seven-race combination.
Leg 7: Kansas Senate, Roger Marshall (R) at 38%
Kansas has experienced one of the sharpest late prediction-market reversals of the midterm cycle, with Republican incumbent Roger Marshall falling to 38% against Democrat Adam Hamilton. Marshall held a substantial advantage earlier in October, but polling showing a competitive contest has coincided with Hamilton moving ahead in market pricing during the final days.
Kansas has not elected a Democratic U.S. senator since 1932, making the possibility of a Democratic victory historically significant. The Republican selection relies on an outcome that would preserve the state's longstanding partisan pattern, although the market's late reversal and tighter polling highlight the uncertainty surrounding Marshall's reelection campaign.
Polymarket 7-Leg Parlay Payout and Senate Balance of Power (Bet $10 to win $331 on Polymarket Here)
Election | Selection | Market-implied chance |
|---|---|---|
Texas Senate | James Talarico (D) | 76% |
Michigan Senate | Abdul El-Sayed (D) | 81% |
Ohio Senate | Sherrod Brown (D) | 72% |
Alaska Senate | Mary Peltola (D) | 72% |
Maine Senate | Susan Collins (R) | 26% |
Iowa Senate | Ashley Hinson (R) | 47% |
Kansas Senate | Roger Marshall (R) | 38% |
The seven-leg combination offers a return of approximately 33 times the original stake, with a $10 position producing $331.43 in total payout if every selection wins. That price corresponds to an implied chance of roughly 3%, before accounting for trading costs and market pricing effects, illustrating how three selections against current market sentiment significantly increase the overall payout.
Maine is the most challenging leg by its individual market price, followed by Kansas and Iowa, while the four Democratic selections are each priced above 70%. However, combining several relatively high-priced individual outcomes does not make the entire seven-race ticket a high-probability event, particularly because all seven results must occur together.
The political implications are substantial. Under the map's assumption that every other Senate election follows its current market favorite, this combination would give Democrats control of the chamber by a 51-49 margin, with Texas, Alaska and Ohio delivering crucial pickups while Michigan remains in Democratic hands.
That outcome would also leave Republicans holding the competitive seats in Maine, Kansas and Iowa, preventing a broader Democratic expansion while still allowing a narrow change in Senate control. The result would demonstrate how a relatively small number of individual state elections can determine the national balance of power, even when the winning coalition includes victories from both parties across the seven selected contests.
Ultimately, the $10-to-$331.43 combination is a low-priced market outcome rather than a reflection of the individual candidates' average chances. With several Senate contests separated by narrow polling margins and significant late market movement, the seven-race map illustrates both the uncertainty of Election Day and the narrow pathways that could determine which party controls the Senate in January 2027.
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