Midterm Elections 2026: Why Election Betting Is Losing Ground on Kalshi and Polymarket
Prediction markets have never been bigger. Platforms like Kalshi and Polymarket have grown more than 20-fold since October 2024. Yet as the 2026 US midterm elections approach, election betting is becoming a smaller part of the action. Sports and crypto markets are pulling in most of the traders and most of the money.
That is a surprising shift. Election betting was once the headline product for these platforms. Now it looks more like a side dish.
What Are Prediction Markets?
Prediction markets let people buy and sell contracts based on the outcome of future events. A contract might pay $1 if a certain candidate wins, or if a certain bill passes. The price of the contract moves with the crowd’s view of the odds. If a contract trades at 60 cents, the market is roughly saying there is a 60% chance the event happens.
Kalshi is a US-regulated exchange. Polymarket is a crypto-based platform that has faced US restrictions in the past. Both have become well known for listing political events, including elections.
Rapid Growth, Changing Mix
The overall market is booming. Trading volume has exploded since late 2024, helped by a busy election year and growing public interest in event contracts. But growth in total volume does not mean every category is growing equally.
Ahead of the 2026 midterms, sports and crypto contracts are attracting the most attention. Sports betting is a huge global habit, and fans are already used to betting on games. Crypto traders are comfortable with fast-moving, round-the-clock markets. Both groups trade often and in large size.
Election markets, by contrast, are seasonal. Interest spikes near Election Day and then fades. Between big votes, trading can be thin. That makes election betting a smaller share of activity even when the platforms themselves are growing.
Why Sports and Crypto Are Winning
There are a few simple reasons for the shift.
Frequent Events
Sports offer games almost every day. Crypto prices move every minute. Elections happen once in a while. Traders who want constant action naturally drift toward markets that never sleep.
Familiar Audiences
Many people already understand a football spread or a bitcoin price chart. They do not need to learn how a contract works from scratch. Election markets require more homework about polls, districts and turnout.
Bigger Liquidity
More traders mean tighter prices and easier exits. Liquidity attracts more liquidity. Sports and crypto markets are building that flywheel faster than political markets right now.
Regulation and Scrutiny
The shift comes as Kalshi and Polymarket face closer attention from regulators and lawmakers. Two issues stand out.
The first is market manipulation. Critics worry that a small number of wealthy traders could move prices on political contracts. That could mislead the public about real odds. Platforms say they monitor for abuse, but the concern has not gone away.
The second is state gambling laws. Several states have argued that event contracts look a lot like sports betting, which is tightly regulated at the state level. Kalshi has fought these battles in court. Polymarket has faced its own US regulatory hurdles. The outcome of these fights could shape which products survive and where.
What It Means for Investors
For general investors, prediction markets are worth watching but not rushing into. They are a useful gauge of crowd expectations, especially around elections and economic events. But they are not a substitute for diversified investing.
The bigger story may be the business itself. If sports and crypto keep driving volume, the platforms may look more like betting exchanges than political forecasting tools. That could invite more regulation, not less.
For now, the 2026 midterms will be a test. Election betting may still draw headlines. But the trading dollars are moving elsewhere.
