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By Amanda Greenwood
Associate News Editor
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With less than 100 days until the 2026 midterm elections, prediction markets suggest Democrats have a plausible path to retaking the Senate—though not a guaranteed one.
Republicans currently hold a 53-45 Senate majority (two are independents), meaning Democrats need a net gain of four seats to take outright control of the chamber, because Vice President JD Vance would break a 50-50 tie in favor of Republicans.
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Kalshi’s 2026 Senate election guide notes that Democrats must reach 51 seats to win control under that math.
The clearest Democratic path runs through four Republican-held seats:
- Alaska
- Maine
- North Carolina
- Ohio
The Cook Political Report rates Alaska, Maine and Ohio as "Toss Ups"—which indicates that both parties have a realistic chance of winning—while North Carolina is rated Lean Democrat—meaning a competitive race, but Democrats have an edge—despite it being a GOP-held open seat.
Cook also rates Michigan, a Democratic-held open seat, as a Toss Up, so Democrats could flip multiple Republican seats and still fall short if they lose there.
Prediction markets broadly reflect that tension.
Kalshi’s Senate markets currently show Democrats favored in Alaska, Maine and North Carolina, while Ohio is nearly a 50-50 coin toss.
When looking at control of the Senate as a whole rather than individual races, Polymarket gives Republicans a 55 percent chance of retaining the chamber, compared with 47 percent for Democrats.
It should be remembered that prediction markets represent investor sentiment and trading activity rather than scientific public opinion polling of actual voters.
Will the Republican Party control the Senate after the 2026 Midterm elections?
Yes 55% · No 46%
View full market & trade on Polymarket
Alaska
In Alaska, Kalshi gives the Democratic Party a 55 percent chance of winning the Senate race, compared with 45 percent for Republicans.
Polymarket’s Senate market is similar, giving Democrat Mary Peltola a 54 percent chance in the race.
The polling picture is mixed but competitive. A New York Times/Siena University poll conducted June 15-29 found Republican Senator Dan Sullivan leading Peltola 47 percent to 45 percent among likely voters. But several Alaska Survey Research polls earlier in the cycle showed Peltola ahead, including a June 4-7 survey that had her leading Sullivan 49 percent to 44 percent.
Will Mary Peltola win the Alaska Senate race in 2026?
Yes 54% · No 47%
View full market & trade on Polymarket
Maine
Maine is another Republican-held seat where prediction markets currently give Democrats the edge.
Kalshi lists the Democratic Party at 64 percent to win the race, compared with 36 percent for Republicans.
Polymarket is closely aligned, giving Democrats a 69 percent chance in the Maine Senate race.
Recent polling also shows a competitive race for Republican Senator Susan Collins. A University of New Hampshire Survey Center poll conducted July 15-20 found Democrat Troy Jackson leading Collins 49 percent to 46 percent.
Will the Democrats win the Maine Senate race in 2026?
Yes 69% · No 32%
View full market & trade on Polymarket
North Carolina
North Carolina may be the strongest Democratic opportunity among the four GOP-held battlegrounds. Kalshi gives Democrat Roy Cooper a 91.2 percent chance of defeating Republican Michael Whatley.
Polymarket also lists Cooper's chances of winning at 91 percent to Whatley's 11 percent.
A Public Policy Polling survey conducted July 9-10 found Cooper leading Whatley 48 percent to 44 percent, while a New York Times/Siena University poll from June 15-27 had Cooper ahead 50 percent to 43 percent.
Cook rates North Carolina as Lean Democrat, making it the only Republican-held seat in the four-state group that’s not listed as a Toss Up. But North Carolina has remained a difficult state for Democrats in federal races, meaning Cooper’s advantage would still need to hold through a competitive general election campaign.
Will the Democrats win the North Carolina Senate race in 2026?
Yes 91% · No 10%
View full market & trade on Polymarket
Ohio
Ohio is the most uncertain of the four GOP-held targets. Kalshi gives Republican Jon Husted a 51 percent chance of winning, compared with 49 percent for Democrat Sherrod Brown.
Polymarket also shows Brown in the lead with a 52 percent chance of winning, compared with 50 percent for Husted.
A New York Times/Siena University poll conducted June 15-28 found Husted leading Brown 50 percent to 47 percent. But an AARP poll conducted by Fabrizio, Lee & Associates and Impact Research from June 14-16 found Brown ahead 48 percent to 45 percent, while a Tulchin Research poll showed Brown leading 46 percent to 42 percent in a multicandidate matchup.
Ohio has shifted right in recent presidential elections, but Brown’s long history of statewide wins gives Democrats a credible opening. That combination—Republican state fundamentals but a well-known Democratic candidate—is why both Cook and the markets treat the race as one of the cycle’s most important toss ups.
Will the Democrats win the Ohio Senate race in 2026?
Yes 52% · No 49%
View full market & trade on Polymarket
The Michigan Problem
Even if Democrats win all four Republican-held battlegrounds, Michigan could complicate their path to the majority.
Cook rates Michigan, currently held by Democrats, as a Toss Up.
Kalshi gives Democrat Abdul El-Sayed a 56 percent chance of winning the seat, compared to Republican Mike Rogers on 44 percent.
Meanwhile, Polymarket gives El-Sayed a 59 percent chance of winning, compared to 44 percent for Rogers.
That means Democrats’ best-case map is still fragile. If they flipped Alaska, Maine, North Carolina and Ohio but lost Michigan, they would gain only three net seats—not enough for outright control under the current 53-47 Senate split.
Will the Democrats win the Michigan Senate race in 2026?
Yes 59% · No 42%
View full market & trade on Polymarket
What the Markets Say Overall
The prediction markets point to a Senate map that is highly competitive but not yet clearly Democratic. Kalshi’s individual race markets show Democrats favored in several of the races they need, including Alaska, Maine and North Carolina, with Ohio nearly even. But Kalshi's Senate control market gives Republicans the edge overall.
The reason is simple: Democrats have little room for error.
At less than 100 days out, the markets suggest Democrats have a viable path to a Senate majority. Still, they may need to win most or all of the key Republican-held battlegrounds while also defending vulnerable seats such as Michigan.
Correction: 7/27/26, 8:53 a.m. ET: This article has been changed to state that the Republicans hold a 53-45 Senate majority, with two independents, not a 55-45 Senate majority as originally stated.
Contact Newsweek editors on this story: Daniel Orton and Tony Phillips
Update 8/11/26 8.30 a.m. ET: This article was updated with additional information.
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