Democrats are the clear favorite to take the House in November, and Kalshi's traders and our price-blind AI panel agree on that. They part ways on the Senate. The market gives Democrats close to a coin flip there. The panel, working from the actual list of seats in play, puts it near one in five. That single gap decides which of the four possible Novembers is the favorite. The market's top pick is a full Democratic sweep at 47 cents. The panel's favorite is a split Congress, Democratic House and Republican Senate, which it prices at 55 percent against a market price of 39 cents.
The seat-by-seat board, the Senate math behind the call, and the individual races the panel has scored are below. Prices are Kalshi's as of August 18, 2026. The panel's estimates were generated August 8 and have not been re-run since.
The Market
| Venue | Kalshi, a CFTC-regulated exchange (18+; availability varies by state, as of August 2026) |
| The Event | "2026 Midterms: Congress Balance of Power" (ticker KXBALANCEPOWERCOMBO-27FEB), four mutually exclusive outcomes, one contract each |
| Settles | On which party controls each chamber as of February 1, 2027, decided by the November 3, 2026 elections |
| Prices As Of | August 18, 2026: D-House/D-Senate 47¢ · D-House/R-Senate 39¢ · R-House/R-Senate 15¢ · R-House/D-Senate 1.4¢ |
This is a neutral, data-driven analysis. It presents both parties' paths identically, advocates for neither, and every electoral fact in it was machine-fetched from the named sources at generation time.
The Board
Six models returned verdicts on this run; the GPT and Gemini seats were unavailable. None of them saw Kalshi's prices. Each priced all four outcomes in one pass, so no model could favor a Democratic House in one row and contradict itself in another.
| Outcome | Market | Fable | Opus | Sonnet | GLM | Kimi | DeepSeek | Blend | Edge |
|---|---|---|---|---|---|---|---|---|---|
| D House / R Senate (Split) | 39¢ | 58 | 55 | 61 | 44 | 58 | 55 | 55.2% | +16.2 |
| D House / D Senate (Sweep) | 47¢ | 20 | 21 | 14 | 8 | 22 | 20 | 17.5% | −29.5 |
| R House / R Senate (R Hold) | 15¢ | 20 | 21 | 21 | 41 | 18 | 20 | 23.5% | +8.5 |
| R House / D Senate (Reverse) | 1.4¢ | 2 | 3 | 4 | 7 | 2 | 5 | 3.8% | +2.4 |
Read by chamber, the market has Democrats taking the House at 85 cents and the panel at about 73 percent. On the Senate the market sits near 48 cents and the panel at 21.
Model estimates were generated August 8, 2026, price-blind, from the data card described below; market prices were re-fetched August 18, 2026. These are model estimates, not predictions of fact and not financial or trading advice. Models are frequently wrong, and the market price reflects real traders' money. Our full graded record, including the events we have lost to the market, is public.
Why Both Sides Expect A Democratic House
The president's party has lost House seats in 18 of the 20 postwar midterms, an average of 25.6. The two exceptions, 1998 and 2002, each needed a dominant national event to flip the usual referendum dynamic, and nothing like that is on the board now. The panel's last firm polling read, from late June, had the generic ballot at Democrats +5.0 and presidential approval at a net of −17.8. Midterm losses run worse for presidents that far under water. The panel is a shade more cautious than the market because of the weeks still to run, but the two readings point the same way.
Why The Panel Fades A Democratic Senate
Democrats need a net gain of four seats, and only four Republican-held seats are rated competitive. Every other Republican seat, including the open ones in Alabama, Iowa, Kentucky, Montana and Wyoming, sits in a state the party wins by double digits. Three Democratic seats are competitive too, and Michigan is a true tossup.
| Seat | Held by | Status | Rating |
|---|---|---|---|
| North Carolina | Republican | OPEN (Tillis retiring) | Lean D flip, the best target on the board |
| Maine | Republican | Collins, incumbent | Tossup |
| Alaska | Republican | Sullivan, incumbent | Tossup |
| Ohio (Special) | Republican | Husted, appointed | Tossup |
| Michigan | Democrat | OPEN (Peters retiring) | Tossup, a live Republican flip chance |
| Georgia | Democrat | Ossoff, incumbent | Lean D |
| New Hampshire | Democrat | OPEN (Shaheen retiring) | Lean D |
So a Democratic Senate means winning essentially every competitive Republican seat in the country while holding all three defenses. Lose Michigan and the requirement becomes a fifth pickup from the safe-Republican tier. A House wave lifts a party's candidates a few points everywhere, which flips dozens of close districts, but a few points does not turn Alaska or a Maine incumbent into a safe seat. In 2018 Democrats gained 41 House seats and still lost two in the Senate, because the map decided the upper chamber. Every model on the panel made the split its single most likely outcome for that reason.
The Case For A Republican Hold
The market prices a Republican hold at 15 cents and the panel blends it at 23.5. Three of the six models opened with the Republican hold as their most likely outcome, reasoning from midterm gravity and the map, then moved to the split after weighing the House base rate. GLM kept a unified Republican Congress as a loud second at 41 percent, arguing that low presidential approval could prove more decisive than the generic ballot. If the June generic-ballot lead has faded since the panel's last polling read, this is the outcome that benefits. The reverse split, a Republican House with a Democratic Senate, is nobody's base case at 1.4 cents; the panel prices it like a lottery ticket at 3.8.
What Moved Between August 8 And August 18
The first real votes of the cycle are in. Minnesota and Wisconsin primary voters on August 11 nominated Lisa Demuth (Republican, Minnesota governor), Peggy Flanagan (Democrat, Minnesota Senate) and David Crowley (Democrat, Wisconsin governor), and Darline Graham finished first in South Carolina's Republican special-Senate primary. Kalshi's markets on those races settled on August 12 and August 14. Flanagan's row matters most here: Minnesota is a Likely-D hold, and its Democratic name is now on the November ballot with the market's read on the seat essentially unmoved, which is what the panel's Senate arithmetic assumed.
Over the same window the Democratic sweep firmed from 44 to 47 cents. Democratic Senate control moved from 45 to 48. The panel's numbers stay frozen where August 8 left them, so the sweep gap it fades got three points wider. Florida, Alaska and Wyoming voted on August 18; our when do polls close guide carries that slate.
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The Senate Races That Decide It
Each row links to that race's full model verdict.
| Race | Seat | Cook / Sabato rating | Our verdict |
|---|---|---|---|
| North Carolina Senate | OPEN, Tillis retiring | Lean D flip | Cooper vs. Whatley |
| Maine Senate | Collins (R) incumbent | Tossup | Collins vs. Jackson |
| Georgia Senate | Ossoff (D) incumbent | Lean D | Ossoff vs. the field |
| Michigan Senate | OPEN, Peters retiring | Tossup | El-Sayed vs. Rogers |
| Minnesota Senate | OPEN, Smith retiring | Likely D | Flanagan vs. the field |
| New Hampshire Senate | OPEN, Shaheen retiring | Lean D (Sabato) | Pappas vs. Sununu |
| Iowa Senate | OPEN, Ernst retiring | Likely R | Hinson vs. Turek |
| Texas Senate | R-held (Paxton primary) | Lean R | Paxton vs. Talarico |
The chamber-level boards from the same panel: House Control 2026, 2026 Senate control and the full Balance of Power four-way breakdown. New to election contracts? Start with how election prediction markets work.
Every verdict above is stored as a graded row on our public model scoreboard, and each model's four-way call gets scored against the actual result when this market settles, win or lose.
To be explicit: these are model estimates for information and entertainment, not financial advice and not a recommendation to trade any contract. This analysis advocates for no party and no outcome. Event contracts are for adults 18+ where legal, on CFTC-regulated venues.
Prices on this page are Kalshi's book. If you also trade on Polymarket, code OS4 gets new users a $50 trading bonus on a $10 deposit — affiliate link; terms as stated by Polymarket; 18+, availability varies by state.
