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Top story Midterm election betting tops $1.9 billion as prediction markets price a Democratic sweep

Record trading volume on Kalshi and Polymarket shows election wagering has gone mainstream even as regulators and lawmakers scrutinize the venues.

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Prediction markets put Democratic chances of sweeping Congress near 75% on Election Day

Markets and final polls converge on a strong Democratic night, with traders pricing roughly 75% odds of winning both chambers.

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Democratic Senate chances hit 73% to 75% in Kalshi and Polymarket pricing

Multiple trackers show the Senate control market narrowing to a mid-70s probability for Democrats in the final hours of voting.

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Democrat Andrews wins South Carolina Senate race, defying prediction market odds

The upset result came despite markets favoring Republican Lindsey Graham, a rare miss for election traders.

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Prediction markets face a midterms stress test as election bets soar

Analysts and reporters are treating the 2026 midterms as the biggest accuracy test yet for election markets.

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Senators press Kalshi and Polymarket to prove election odds are not tainted

Lawmakers are demanding integrity safeguards as prediction market election volume reaches record highs.

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Midterms fuel prediction market boom as regulators push crackdowns

State officials warn of felony exposure for election bettors while oversight of the venues remains unsettled.

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Judge denies injunction against Wisconsin ban on betting then voting in elections

The ruling keeps Wisconsin's restriction on election wagering in place as states test their authority over prediction markets.

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Final FLIPR and other models show a blue tsunami in the midterms

Nate Silver's final forecast and other models align with markets in projecting large Democratic gains.

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Bettors wager $33 million on Michigan Senate race, favoring Abdul El-Sayed

Michigan is among the most heavily traded individual races on Kalshi as bettors lean toward the Democratic candidate.

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Texas Senate odds show James Talarico leading Ken Paxton at all-time high

Prediction markets diverge from tighter polling in the Texas Senate contest, with Talarico favored.

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Who will win the 2026 midterms? Polls, models and markets head into Election Day

Broad previews round up the final polling, model and market expectations for House and Senate control.

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Polls and prediction markets differ on Democrats' odds, with markets more bullish

Several analyses note markets assigning higher confidence to a blue sweep than traditional polling averages.

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Nate Silver flags 'insane' pattern in final Election Day Polymarket forecasts

The forecaster contrasted his polling model with prediction market pricing in the closing hours of the race.

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Iowa Senate odds flip to Turek in Polymarket midterms market

A late shift in the Iowa Senate market moved the favored candidate as Election Day approached.

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Kathy Hochul wins New York, with implications for iGaming and prediction markets

The New York governor's race outcome shapes the state's posture toward online betting and prediction venues based there.

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