2026 Midterms Tracker
Real-time prediction market odds for the 2026 US midterms — closest Senate and House races plus chamber control, sourced from Kalshi and Polymarket, updated every 15 minutes.
POLITICS
Live Senate, House & balance-of-power odds — updated all cycle
What is this?
The 2026 midterms decide control of both chambers. This tracker rotates through the most competitive Senate races, the most competitive House races, and the balance-of-power contracts that price which party controls each chamber after January 2027 — all sourced live from Kalshi and Polymarket.
Control markets move on every close race. When a single Senate seat re-prices, the chamber-control contract re-prices with it — and the two don't always stay in sync. That lag is where a sharp trader finds a position.
Real-World Example
→ The Control Lag
A toss-up Senate seat drifts from 50¢ to 58¢ for one party after a recruiting win. The seat market moves fast — but the chamber-control contract is still pricing the old map at 44¢.
You take a position on control before the market finishes connecting the dots. As more seats confirm the trend, the control contract catches up and you're already in.
✅Action: Watch the closest races and the control contract together — when they disagree, the market hasn't finished pricing the map.
Bottom line: Single-seat moves lead chamber-control prices. The lag between them is the edge.
Full guide →Quick Answer
As of October 13, 2026, Kalshi prices Democrats to control the Senate at 61% and Democrats to control the House at 89%. The closest Senate race is ME (Troy Jackson 57%). Each contract pays $1 if that outcome happens, so the price is the market's probability.
The 2026 midterms decide control of the Senate and House. This tracker surfaces the most competitive races on each side and the balance-of-power contracts that price which party controls each chamber after January 2027 — sourced live from Kalshi and Polymarket. Each contract is a binary: it pays $1 if it resolves yes, $0 if not, so the price is the market's consensus probability, updated continuously.
Source: Kalshi + Polymarket · Updated 3:22 AM EDT
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What are the 2026 midterm odds right now?
As of October 13, 2026, Kalshi prices Democrats to control the Senate at 61% and Democrats to control the House at 89%. Each contract pays $1 if that outcome happens, so the price is the market's probability.
Why use prediction markets for 2026 midterm odds?
Polls measure opinion. Prediction markets measure conviction. On Kalshi, a trader who thinks a party flips a Senate seat puts real money behind that view — and loses it if they are wrong. That skin in the game forces price discovery that polls can't replicate, race by race.
How to read the closest races vs. chamber control
There are two layers to watch:
- Closest races — individual Senate and House contests sorted by how close they are to a coin flip. These are where single events (recruiting, scandals, retirements) move prices fastest.
- Balance of power — chamber-control contracts that aggregate every seat into one probability. When the seat markets and the control contract disagree, the market hasn't finished repricing the map — that lag is the opportunity.
Embed this 2026 midterms tracker
Click the Embed button above. The hero rotates through the closest Senate races, closest House races, and balance-of-power contracts — perfect for politics blogs and newsletter headers. One iframe, no maintenance, auto-updates from live market data.
Frequently Asked Questions
What are the 2026 midterm odds right now?
As of October 13, 2026, Kalshi prices Democrats to control the Senate at 61% and Democrats to control the House at 89%. Each contract pays $1 if that outcome happens, so the price is the market's probability.
Who is favored to win the Senate in 2026?
As of October 13, 2026, Kalshi prices Democrats to control the Senate at 61% and Polymarket (international book) at 64%. The price is read from Kalshi's balance-of-power market.
Who is favored to win the House in 2026?
As of October 13, 2026, Kalshi prices Democrats to control the House at 89% and Polymarket (international book) at 91%. The price is read from Kalshi's balance-of-power market.
What does Kalshi say about the 2026 midterms?
As of October 13, 2026, Kalshi's balance-of-power market puts the Senate at 61% Democrats and the House at 89% Democrats. Kalshi is a CFTC-regulated exchange, and each contract settles at $1 or $0.
What does Polymarket say about the 2026 midterms?
As of October 13, 2026, Polymarket (international book) prices Democrats for the Senate at 64% and Democrats for the House at 91%. That book is separate from Polymarket US, and its prices are not interchangeable with it.
How accurate are prediction markets on midterm elections?
Markets and forecasters are scored side by side, race by race, on the markets-vs-pundits page at /midterms-2026/markets-vs-pundits. A price is a probability, not a guarantee, so a market favorite still loses some of the time.
How are prediction markets different from midterm polls?
Polls measure stated opinion. Prediction markets measure conviction — traders put real money behind their view and lose it if they are wrong. That skin in the game forces continuous price discovery across every competitive Senate and House race.
What does "balance of power" mean on this tracker?
Balance-of-power contracts price which party controls each chamber of Congress after January 2027 — for example, "Republicans control the Senate" or "Democrats control the House". They aggregate every individual seat market into a single chamber-level probability.
Can I embed this 2026 midterms tracker on my site?
Yes — click the Embed button to get a free iframe. The hero rotates through the closest Senate races, closest House races, and balance-of-power contracts. Paste one line of code. No API key or signup required.
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