With the US midterms one day away, Polymarket traders are pricing Democratic control of the House at about 95%, Democratic control of the Senate at 74%, and a Democratic sweep of both chambers at 73%. But Votendi’s latest weighted polling averages show why several of the Senate contests underpinning those market prices remain competitive.
- Control of Congress: three different Polymarket markets
- Eight Senate races: Polymarket odds versus Votendi’s polling margins
- Iowa is nearly tied in both measures — but for different reasons
- Kansas, Texas and Maine: where market confidence exceeds the size of the polling lead
- What do Votendi’s seat figures actually say?
- What to watch on election night
Those figures are market-implied probabilities, not election results or Votendi forecasts. They reflect prices at the time Polymarket’s 2026 midterms dashboard was checked on November 2, 2026; they can change continuously before and during election night. Votendi’s numbers, by contrast, measure estimated candidate support in opinion polls, not the probability of winning.
Control of Congress: three different Polymarket markets
| Market | Polymarket price for Democratic outcome | What it measures |
|---|---|---|
| House of Representatives control | About 95% | Democratic control of the House after the election |
| Senate control | 74% | Democratic control of the Senate after the election |
| Balance of power | 73% | Democrats controlling both the House and Senate |
Source: Polymarket 2026 Midterms dashboard, checked November 2. Percentages are rounded market prices and are not polling percentages. The market for both chambers is a separate contract, not the sum or average of the two chamber-control markets.
For comparison, Votendi’s national generic congressional ballot currently shows Democrats on 50.0% and Republicans on 41.9%, an 8.1-point lead across 92 published polls, with that aggregate last updated October 30. A national vote-intention lead is not a seat forecast: the House majority is decided across 435 separate districts.
Votendi also displays the Cook Political Report’s external House ratings, dated October 30: 222 districts in Democratic categories, 195 in Republican categories and 18 unallocated or rated toss-up. These are external race assessments, not seats already won and not Votendi’s own forecast.
Eight Senate races: Polymarket odds versus Votendi’s polling margins
The sharper comparison is in the Senate, where each state is a separate election. The table below reports the candidate with the higher Polymarket contract price alongside the lead in Votendi’s published weighted polling average. A polling margin is the difference between two candidates’ vote shares; a market price estimates the chance of a specified election outcome. They are different units and should not be compared as percentages of the same thing.
| State | Polymarket: higher-priced candidate | Votendi weighted polling average | Polling margin |
|---|---|---|---|
| Michigan | Abdul El-Sayed (D) — 80% | El-Sayed 48.8% · Rogers 44.6% | D +4.2 pts |
| Texas | James Talarico (D) — 76% | Talarico 49.0% · Paxton 46.1% | D +2.9 pts |
| Maine | Troy Jackson (D) — 75% | Jackson 49.2% · Collins 46.3% | D +2.9 pts |
| Alaska | Mary Peltola (D) — 73% | Peltola 47.5% · Sullivan 45.6% | D +1.9 pts |
| Ohio | Sherrod Brown (D) — 73% | Brown 48.0% · Husted 44.4% | D +3.6 pts |
| Kansas | Adam Hamilton (D) — 63% | Hamilton 47.8% · Marshall 45.2% | D +2.6 pts |
| Iowa | Ashley Hinson (R) — 52% | Hinson 46.2% · Turek 46.1% | R +0.1 pts |
| North Carolina | Roy Cooper (D) — 98% | Cooper 50.3% · Whatley 41.3% | D +9.0 pts |
Sources and timing: Polymarket live Senate race board and Votendi US Midterms hub, both checked November 2, 2026. Senate state averages include surveys through their displayed latest dates, generally November 1 for the seven central battlegrounds; North Carolina’s latest included survey is dated October 25. Market prices can move after publication. Percentages are rounded and no probability estimate has been calculated from Votendi’s polls.
Iowa is nearly tied in both measures — but for different reasons
In Iowa, the market’s higher-priced outcome is Republican Ashley Hinson at 52%, barely above an even-money market. Votendi’s 19-poll average is also exceptionally narrow: Hinson 46.2%, Democrat Josh Turek 46.1%, a difference of only one tenth of a percentage point. This margin is much smaller than normal polling uncertainty and cannot settle the result.
The final New York Times/Siena poll separately found Turek ahead by one point, illustrating how one recent survey can differ from a multi-poll average. The polling disagreement is not, by itself, proof that either dataset is wrong.
Kansas, Texas and Maine: where market confidence exceeds the size of the polling lead
The contrasts are particularly visible in Kansas, Texas and Maine. Polymarket’s checked prices were 63% for Adam Hamilton in Kansas, 76% for James Talarico in Texas and 75% for Troy Jackson in Maine. Yet Votendi’s corresponding Democratic polling advantages are just 2.6, 2.9 and 2.9 percentage points.
Those numbers are not inconsistent. A market price is influenced by the entire distribution of plausible outcomes and by traders’ expectations, while the polling average describes the central estimate of support. A lead of several points does not translate mechanically into a matching win probability, and market pricing can be affected by liquidity, trading activity or sentiment.
Michigan, meanwhile, is a Democratic-held seat. Its inclusion among heavily traded contests should not cause readers to treat an El-Sayed win as an additional Democratic gain. By contrast, Republican-held states such as Texas, Maine, Ohio, Alaska and Kansas are relevant to changes in the Senate’s party balance.
What do Votendi’s seat figures actually say?
The distinction matters at the national level. The Senate currently has 53 Republicans, 45 Democrats and two independents who caucus with Democrats. That is a 53–47 Republican advantage by caucus alignment. With a Republican vice president able to break a 50–50 tie, Democratic control requires at least 51 seats, or a net gain of four seats.
Votendi’s Senate overview publishes the Cook Political Report’s October 30 ratings: 47 Democratic-aligned, 46 Republican and seven toss-up seats. These are attributed external classifications rather than a Votendi seat forecast. If — strictly as an arithmetic exercise — the seven toss-ups are allocated to the candidates currently leading in Votendi’s weighted averages, the result would be 53 Democratic-aligned seats and 47 Republican seats. That conditional total is not a prediction: it assumes every non-toss-up seat follows its classification and every selected polling leader wins.
Polymarket’s roughly 74% price for a Democratic Senate majority is therefore answering a different question from either Votendi’s state averages or this illustrative 53–47 seat allocation.
What to watch on election night
Three comparisons will be especially informative once official results arrive: whether the near tie in Iowa is reflected in votes, whether the relatively small Votendi polling gaps in Kansas, Maine, Alaska and Texas hold up, and whether the external market’s pricing for chamber control tracks the accumulation of confirmed Senate and House results.
Neither polls nor prediction markets should be confused with certified returns. Votendi will distinguish reported election results from its pre-election polling trackers, while Polymarket contract prices may change sharply as states report votes.
Methodology and sources: Polymarket — US Midterms 2026; Polymarket Senate-control market; Polymarket House-control market; Votendi 2026 US Midterms hub and individual race polling averages; Votendi’s October 30 comparison; NYT/Siena November 1 surveys. Snapshot date: November 2, 2026. Votendi’s polling averages use recency, sample size, pollster grade, methodology and editorial weighting, as explained in the methodology page.
