US Election Prediction Markets Explained: Platforms, Odds & What They Mean
Updated August 20, 2026
Updated August 20, 2026
US election prediction markets have become a much bigger part of the political cycle in 2026. Traders can now follow live prices on everything from control of Congress to individual Senate races and the still-wide-open 2028 presidential field.
The growth has been significant. By mid-August, around $133 million had already been traded on 2026 US midterm election markets, according to data reported by Reuters — more than the $92.4 million tracked across the entire 2024 congressional election cycle.
Platforms such as Kalshi, Polymarket, and PredictIt give users a live view of how traders are pricing congressional control, Senate races, presidential nominees, and other political outcomes.
This page tracks the most important US election prediction markets for 2026 and 2028, explains what the prices mean, and compares the major platforms available to election-market traders.
Market prices are snapshots checked for this August 2026 update and can change quickly. Legal availability can vary by platform, market type, and user location. This page is for informational purposes only and is not financial, legal, or political advice.
The clearest signal heading toward the 2026 midterms is the growing difference between the House and Senate.
On Kalshi, Democrats are currently strong favorites to win control of the House, with the market recently pricing them at around 85%. Republicans sit at roughly 15%.
The Senate is considerably closer. Kalshi's broader midterm forecast recently gave Republicans around a 55% chance of controlling the Senate, leaving Democrats around 45%.
That creates a realistic possibility of divided congressional control: a Democratic House combined with a Republican Senate.
The 2028 presidential markets tell a different story. J.D. Vance is currently the leading individual candidate on Polymarket, but even he sits at only around 23% to win the presidency. Marco Rubio, Alexandria Ocasio-Cortez, Gavin Newsom, and Jon Ossoff are among the names behind him, illustrating just how unsettled the field remains.
Market | Current Market Read |
|---|---|
2026 House Control | Democrats around 85% |
2026 Senate Control | Republicans around 55% |
2028 Presidential Winner | J.D. Vance leads at around 23% |
2028 Republican Nominee | J.D. Vance around 44% |
2028 Democratic Nominee | No clear favorite; top candidates clustered around 15–20% |
Quick read: Democrats are heavily favored in the House market, the Senate remains competitive with Republicans holding a narrow advantage, and the 2028 presidential field is still extremely open.
US election prediction markets allow users to trade contracts tied to political outcomes.
A contract might ask:
The price acts as a market-implied probability.
If a Yes contract trades at around $0.63, for example, traders are broadly pricing the outcome at roughly a 63% chance. If the outcome occurs, the contract typically settles at $1. If it does not, the Yes contract settles at $0.
That does not mean a 63% outcome is guaranteed. It means the market currently considers it more likely than not.
Prediction-market prices can react quickly to new polling, candidate announcements, court rulings, fundraising reports, debates, economic data, endorsements, and election results.
We prioritize markets based on:
No single prediction market should automatically be treated as authoritative.
The 2026 midterms have become the immediate focus of US political prediction markets.
That interest is already significantly higher than during the last congressional election cycle. Reuters reported in August that approximately $133 million had been traded on the 2026 midterms, already exceeding the congressional-election trading tracked for all of 2024.
The most important takeaway from current pricing is that the House and Senate are moving in different directions.
Democrats are strong favorites in the House market, while Republicans retain a narrow advantage in the battle for the Senate.
That does not mean either outcome is settled. It does mean traders currently see a much clearer Democratic path to the House than to complete control of Congress.
A market trading at 85% is not saying the outcome is certain. It is saying traders currently see that outcome as significantly more likely than the alternative.
At the time of this update:
Democratic Party: approximately 85%
Republican Party: approximately 15%
Kalshi's House control market has become one of the clearest signals in the 2026 midterm cycle, with Democrats moving from a modest favorite earlier in the year to a heavy market favorite.
The current Republican House majority is narrow, while the president's party has historically faced difficult conditions in midterm elections.
That historical pattern is only one factor, however. Individual House districts, candidate quality, presidential approval, economic conditions, turnout, redistricting, and national political events can all move the market before November.
The important point is that "Democratic lean" now understates the current prediction-market view. Traders are pricing a Democratic House as the clear favorite.
The Senate is much closer.
Recent Kalshi pricing has put Republicans at around 53–55% to control the chamber, with Democrats around 45–47%.
That makes Senate control one of the more interesting national political markets.
Unlike the House, where hundreds of individual races contribute to the final result, Senate control can come down to a handful of highly competitive states.
Texas, Ohio, Alaska, Iowa, Maine, and Michigan are among the races that currently deserve the closest attention.
The Senate map has changed considerably as the election has moved closer.
Some races that looked like major battlegrounds earlier in the cycle are now being priced much more decisively, while others have tightened.
Race | Current Market Read | Why It Matters |
|---|---|---|
Texas | Toss-up | One of the most surprising close races on the current map |
Ohio | Near toss-up | Could play a major role in deciding Senate control |
Alaska | Very competitive | Current pricing gives Democrats a narrow market advantage |
Iowa | Republican lean | Competitive enough to matter in a close Senate battle |
Maine | Democratic lean | Susan Collins remains one of the most important Republican-held seats |
Michigan | Democratic lean | Open-seat battleground in a politically competitive state |
Texas has become one of the most notable Senate prediction markets of the cycle.
Recent Kalshi pricing has put Ken Paxton and James Talarico essentially at 50-50, despite Texas voting Republican by a wide margin in the 2024 presidential election.
That makes Texas especially interesting from a prediction-market perspective.
Rather than simply assuming the state's historical Republican advantage will hold, traders are balancing that structural advantage against candidate-specific factors and the national environment.
The race also has significant trading activity, making it more informative than many thinner state-level markets.
Ohio is another race currently hovering near toss-up territory.
Kalshi's midterm forecast has recently placed Democrat Sherrod Brown and Republican Jon Husted within a few percentage points of one another.
A close Ohio race matters because neither party has much room for error if national Senate control remains near 50-50.
Alaska has also emerged as a genuinely competitive market, with recent Kalshi pricing giving Democrats only a narrow advantage.
That makes it one of several races where comparatively small movements could materially change the national Senate-control market.
Iowa currently leans Republican in prediction markets but remains close enough to warrant attention.
Recent Kalshi pricing has put Republican Ashley Hinson ahead of Democrat Josh Turek, but not by enough to place the race comfortably outside the competitive Senate map.
Maine has moved into clearer Democratic-leaning territory.
Recent Kalshi pricing gives Troy Jackson around 65% compared with approximately 35% for Republican incumbent Susan Collins.
Collins' history of winning in a Democratic-leaning state makes Maine different from many Senate races, but the prediction market currently sees Democrats as the favorites.
Michigan is another Democratic-leaning but competitive race.
Recent Kalshi markets have favored Democrats overall, while candidate-level trading has also placed Abdul El-Sayed ahead of Republican Mike Rogers.
The market is considerably closer than races such as Georgia and North Carolina, keeping Michigan firmly in the group of Senate races worth tracking.
Both remain important Senate states, but current prediction-market prices no longer treat them as close races.
Jon Ossoff has recently traded at around 91% to win Georgia against Mike Collins.
In North Carolina, Roy Cooper has been priced at more than 90% against Michael Whatley.
Those numbers can still change before November, but the current market is much more confident about Georgia and North Carolina than it was earlier in the cycle.
The 2028 presidential election is already generating substantial trading activity even though the election is still more than two years away.
One reason is that there is no incumbent eligible to seek another elected presidential term after 2028.
Under the Twenty-Second Amendment, no person may be elected president more than twice. Donald Trump has already been elected twice, meaning the 2028 election will produce a different elected president.
That has created uncertainty on both sides.
On Polymarket's international presidential winner market, J.D. Vance is currently the leading individual candidate at around 23%.
Behind him are several candidates clustered much lower:
The important number is not just Vance's lead. It is that the leading candidate is still only being priced at roughly one chance in four.
That tells us the 2028 market remains highly uncertain.
The Republican field has a clearer early frontrunner.
Recent Polymarket pricing has placed J.D. Vance at around 44% to win the Republican nomination, with Marco Rubio second at approximately 23%.
Kalshi has shown the same general hierarchy, with Vance and Rubio well ahead of the rest of the early field.
That makes Vance the clear market leader, but not an overwhelming one.
A price in the 40% range means traders see him as the most likely nominee while still assigning more combined probability to everyone else.
Potential candidates will also be judged on how they position themselves during the 2026 midterms, their relationship with the Trump administration, fundraising, endorsements, polling, and whether they ultimately decide to run.
The Democratic market is considerably more fragmented.
Recent Polymarket pricing has had Alexandria Ocasio-Cortez, Gavin Newsom, and Jon Ossoff clustered near the top, with none establishing anything close to majority support.
At one recent snapshot:
The ordering has changed repeatedly, which is more important than any single percentage.
Newsom, Ocasio-Cortez, and Ossoff have all spent time near the top of the early market.
That makes the Democratic nomination market a good example of how early prediction-market prices should be interpreted as sentiment rather than settled forecasts.
Candidate announcements, the results of the 2026 midterms, endorsements, fundraising, early polling, and eventually the primary calendar could dramatically reshape the market.
No single prediction-market platform tells the entire story.
Comparing prices across platforms can be useful because each market has different participants, liquidity, contract rules, and access requirements.
Platform | Regulatory / Access Structure | Election Market Strength | Best Use |
|---|---|---|---|
Kalshi | CFTC-designated contract market | Strong US election coverage | US congressional and political markets |
Polymarket | International platform plus separate CFTC-regulated Polymarket US operation | Very deep political-market activity internationally | Global sentiment and major election markets |
PredictIt | Operates under CFTC staff no-action relief | Primarily politics-focused | Secondary political-market signal |
Kalshi is a CFTC-designated contract market and has become one of the central platforms for US election prediction markets. The CFTC continues to list Kalshi as a designated contract market.
Its election offering includes congressional control, individual Senate races, House races, presidential nominations, future presidential elections, and many smaller political markets.
For US election analysis, Kalshi is especially useful because its platform and political markets are heavily US-focused.
Polymarket needs to be separated into its international and US products.
Polymarket.com is the international platform and is not available for trading by US residents.
Polymarket US is a separate US product. Its operator, QCX LLC d/b/a Polymarket US, is listed by the CFTC as a designated contract market.
This is an important change from earlier versions of the US prediction-market landscape. It is no longer accurate to describe Polymarket's regulated US return as merely something being developed in the future.
The international Polymarket platform remains particularly useful as a comparison point because of the substantial trading activity attracted by major political markets.
PredictIt operates under a different model.
It is not a CFTC-designated contract market like Kalshi or Polymarket US. Instead, it operates under CFTC staff no-action relief.
In 2025, the CFTC amended PredictIt's original framework to allow operation of the market to transfer from Victoria University of Wellington to the US-based Prediction Market Research Consortium, or PMRC.
PredictIt remains primarily focused on political events and significant political questions.
Its narrower scope can make it useful as a secondary political signal, particularly when a similar market is also available on Kalshi or Polymarket.
The answer depends on the platform and regulatory structure.
Kalshi operates as a CFTC-designated contract market.
Its ability to offer election contracts changed significantly following its legal battle with the CFTC over congressional-control markets.
In 2024, a federal district court ruled that the CFTC had exceeded its authority when blocking Kalshi's congressional-control contracts. The D.C. Circuit later declined to keep those contracts blocked while the CFTC appealed, allowing election trading to proceed.
Kalshi has since developed a large election-market offering.
That does not mean every legal question surrounding prediction markets has disappeared. Kalshi continues to face state-level disputes over some other categories of event contracts, particularly sports.
Polymarket's US situation is now clearer than it was earlier in the prediction-market boom.
QCX LLC, doing business as Polymarket US, is officially listed as a CFTC-designated contract market.
US residents use the separate Polymarket US product rather than the international Polymarket.com platform. Polymarket itself states that the two products have separate accounts and access structures.
PredictIt operates under CFTC staff no-action relief rather than DCM registration.
The framework was amended in July 2025 to allow the market to move from Victoria University of Wellington to PMRC, a US-based nonprofit organization.
Bottom line: Kalshi and Polymarket US operate through CFTC-designated contract market structures, while PredictIt operates under CFTC staff no-action relief. Users should still check current platform availability, contract rules, and restrictions before trading.
For a broader explanation, see our guide to whether prediction markets are legal in the US.
The easiest mistake is to treat prediction-market prices as election results before the election happens.
They are better understood as live market estimates.
If a Democratic House contract is trading around 85 cents, the market is signaling roughly an 85% implied probability.
That still leaves meaningful uncertainty.
Prices can change because of:
They can also move for less informative reasons.
A thin market can jump several points because of one large trade. A highly liquid market with tight bid-ask spreads usually deserves more weight than a small contract with limited activity.
Liquidity is one of the most important things to check before interpreting an election-market price.
A market with millions of dollars in trading activity generally contains more information than a contract that has attracted only a few thousand dollars.
That does not automatically make the larger market correct. It simply means more capital has participated in determining the price.
Disagreement between platforms can also be useful.
If Kalshi prices an outcome at 55% and Polymarket prices a similar contract at 65%, the gap could reflect:
Before comparing percentages, always check that the contracts actually resolve according to the same conditions.
The most useful approach is not blindly following the current price.
Instead, watch how and why the price changes.
For the 2026 midterms, the key markets include:
Georgia and North Carolina also remain nationally important, although current markets are much more confident in Democratic victories there.
For 2028, the most useful markets right now are probably the party nominations rather than individual state presidential markets.
The Republican nomination market currently has an identifiable leader in J.D. Vance.
The Democratic market remains far more fragmented, with Ocasio-Cortez, Newsom, and Ossoff competing near the top.
Those prices will become more informative as candidates formally enter the race and the 2028 primary process approaches.
An election prediction market allows users to trade contracts based on political outcomes, such as which party will control Congress or which candidate will win an election.
Contract prices function as market-implied probabilities and change as traders respond to new information.
Democrats are currently strong favorites.
Recent Kalshi pricing has put Democrats at around 85% to win control of the House, compared with roughly 15% for Republicans.
Republicans currently hold a narrow prediction-market advantage.
Recent Kalshi pricing has put Republicans at approximately 53–55%, making Senate control considerably more competitive than the House.
Texas is currently one of the closest major Senate markets.
Recent Kalshi pricing has placed Republican Ken Paxton and Democrat James Talarico at essentially 50-50.
Ohio, Alaska, and Iowa are also among the closer races on the current Senate map.
J.D. Vance is currently the leading individual candidate on Polymarket, at around 23%.
The low percentage is important: there is currently no overwhelming favorite to win the presidency in 2028.
J.D. Vance is the current prediction-market favorite.
Recent Polymarket pricing has put Vance around 44%, with Marco Rubio second at roughly 23%.
There is no clear dominant favorite.
Alexandria Ocasio-Cortez, Gavin Newsom, and Jon Ossoff have recently traded close together near the top of the Polymarket Democratic nomination market.
US users should distinguish between Polymarket.com and Polymarket US.
Polymarket.com is the international product and does not allow US residents to trade. Polymarket US is a separate product operated through QCX LLC d/b/a Polymarket US, which is a CFTC-designated contract market.
They can be informative, but they are not guaranteed forecasts.
Prediction markets combine the opinions and capital of traders, and prices can react quickly to new information. However, low liquidity, unusual trader behavior, different contract rules, and unexpected political events can all produce misleading prices.
The platforms have different traders, liquidity levels, access rules, and sometimes different contract language.
A disagreement between the platforms can be useful information, but the contracts should be compared carefully before assuming one market is mispriced.
The 2026 prediction-market picture has become much clearer as the midterms approach.
Democrats are now strong favorites to win the House, while Republicans retain only a narrow advantage in the battle for Senate control.
That makes individual Senate races particularly important. Texas is currently close to a pure toss-up, while Ohio, Alaska, Iowa, Maine, and Michigan could all affect the national Senate picture.
The 2028 race is much less developed.
J.D. Vance has established himself as the early Republican nomination favorite and currently leads the individual presidential winner market. The Democratic side is much more fragmented, with Alexandria Ocasio-Cortez, Gavin Newsom, and Jon Ossoff trading relatively close together.
Most importantly, election prediction markets themselves are becoming far more significant. Trading on the 2026 midterms had already passed the total recorded for the entire 2024 congressional cycle by August, long before Election Day.
That makes the markets increasingly useful to follow — but not because they can tell us the future with certainty.
Their real value is showing how expectations change in real time as new political information reaches the market.
Market prices shown on this page are snapshots and may change quickly. Prediction markets involve risk. Treat all figures as informational market signals, not guarantees, political endorsements, or recommendations.