Election night / November 4, 2026Explore the election odds dashboard

2026 MIDTERM MARKET REVIEW

The market called the sweep.
The count confirmed it.

Kalshi and Polymarket favored Democratic control of Congress before Election Day. Voters delivered both chambers. The useful story is how to read that signal, and where a correct headline forecast stops.

01 / BEFORE THE VOTEMARKET FORECAST
73%

Democratic sweep favored

On November 3, Axios reported Kalshi pricing a 73% chance that Democrats would win both chambers of Congress. It was a probability, not a promised result.

Read the pre-election snapshot
02 / AFTER THE VOTEREPORTED OUTCOME
HOUSE
+ SENATE

Democrats won both chambers

The Associated Press reported that Democrats took control of the House and Senate. Some individual races were still being called when it published its November 4 account.

Read the AP result

The national call landed. That is the cleanest conclusion from election night. It is also only one test of a much larger market.

One correct call does not score every race.

A contract on control of Congress compresses hundreds of races into one outcome. A Senate race, a House district, and a governor contest each have their own liquidity, candidate set, settlement terms, and time of last trade. A correct congressional forecast cannot establish how well every local market performed.

CNBC journalist Ananya Chetia described a comparison of Kalshi, Polymarket, and Polymarket US odds with Senate, House, and governor results. Her visual puts the market view beside the vote count. That is the right way to inspect the night: race by race, at a stated time.

Timing changes the meaning of a call.

Chetia also reported finding at least 10 races where Kalshi had projected a winner before 10 p.m. with less than 1% of the official vote counted, using AP vote counts. Those are reported observations, not an independently verified tally by Kairos. They describe election night speed. They do not, on their own, prove that the market predicted those races before polls closed.

For a fair accuracy study, freeze each contract at the same pre-election timestamp, match its exact resolution rule to the certified outcome, and include the misses. Count unresolved races separately. Otherwise, a market price that moved after returns arrived can look like a forecast made earlier.

Watch the price and the rule.

Prices are tradable quotes shaped by order flow. They can differ across venues because the books, fees, liquidity, and contract wording differ. The price on one venue is not interchangeable with a result or with another venue's contract.

Kairos brings election markets from Kalshi and Polymarket into one view so traders can compare the quotes and inspect the underlying markets. The 2026 midterm election odds dashboard is the market view. This page records the post-election read. Keep both timestamps in sight.

Sources and scope

The comparison above uses Axios's November 3 Kalshi snapshot and AP's November 4 congressional result. Chetia's race-level observations are attributed to her reporting. Kairos has not reproduced the underlying race-level odds and vote-count dataset.

ONE VIEW. EVERY VENUE.

See the markets behind the call.

Compare Kalshi and Polymarket election contracts in the Kairos terminal.

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