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2028 Democratic Presidential Nominee OddsJon Ossoff narrowly leads Alexandria Ocasio-Cortez, 16% to 15%

Kalshi has Jon Ossoff at 17% and Polymarket at 15%. Over the past week on Kalshi, Alexandria Ocasio-Cortez lost 1 point, to 14%.

Favorite on average
16%Jon Ossoff

About 1 in 6Unchanged this week (Kalshi)

Average of Kalshi (17%) and Polymarket (15%).

Prices to buy. Kalshi's quote is stale (observed Oct 4, 9:52 AM ET) and may have moved.

Runner-up on average
15%Alexandria Ocasio-Cortez

About 1 in 7 Down 1 pt this week (Kalshi)

Average of Kalshi (14%) and Polymarket (17%).

Prices to buy. Kalshi's quote is stale (observed Oct 4, 9:41 AM ET) and may have moved.

Kalshi and Polymarket

2028 Democratic presidential nominee

24h volume
$317Kcombined

Kalshi: $287K (90%) · Polymarket: $30K (10%)

Trading closes
Nov 7, 2028

Kalshi: Nov 7, 2028 · Polymarket: Nov 7, 2028

Prices to buy each outcome, or the last trade where no one is selling. Some quotes are stale: they weren't observed recently and may have moved. Tap a price to open Kalshi and Polymarket.

2028 Democratic presidential nominee: Kalshi and Polymarket odds, observed between Oct 4, 7:02 AM and 10:02 AM ET
OutcomeAverageKalshiPolymarketSources
Jon Ossoff16%Kalshi17¢Polymarket15.5¢
Alexandria Ocasio-Cortez15%Kalshi14¢Polymarket17.6¢
Gavin Newsom15%Kalshi14¢Lowest askPolymarket17¢
Kamala Harris6.9%Kalshi7.3¢Polymarket6.8¢
Josh Shapiro5.2%Kalshi4.7¢Polymarket5.9¢
Pete Buttigieg5.1%Kalshi5.1¢Polymarket5.1¢
Andy Beshear4.3%Kalshi6¢Polymarket3.3¢
Mark Kelly3.4%Kalshi4.3¢Polymarket2.7¢
James Talarico3%Kalshi3.4¢Polymarket2.6¢Lowest ask
Rahm Emanuel2.2%Kalshi2.7¢Polymarket1.7¢

Kalshi: OpenPolymarket: Open Average is the mean of each venue's price for the outcome, where it lists one (a quote more than two hours old is left out while another venue's is newer): the midpoint of Kalshi's bid and ask, or its last trade; Polymarket's displayed price, or the midpoint of its bid and ask. Source: Kalshi / Polymarket via DeFi Rate, observed between Oct 4, 7:02 AM and 10:02 AM ET.

The leading six, venue by venueobserved between Oct 4, 9:40 AM and 10:02 AM ET
0%5%10%15%20%KalshiPolymarketOur figureJon Ossoff16%Ocasio-Cortez15%Gavin Newsom15%Kamala Harris6.9%Josh Shapiro5.2%Buttigieg5.1%

The widest gap is on Alexandria Ocasio-Cortez: Kalshi 14% and Polymarket 17%. Our figure is their average.

Price history · Kalshi daily closeAug 3 – Oct 3

Over the past week on Kalshi, Alexandria Ocasio-Cortez lost 1 point, to 14%.

0510152025SepOct17%14%14%7%5%
Jon OssoffAlexandria Ocasio-CortezGavin NewsomKamala HarrisJosh Shapiro

Source: Kalshi daily close via DeFi Rate, Aug 3 to Oct 3 (UTC days). A day without a close is left out.

Market moves

Little movement, last 7 days

Little movement in the last 7 days. The largest was Alexandria Ocasio-Cortez, −1 pt to 14%.

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Source: Kalshi / Novig / Polymarket / Polymarket US / ProphetX / Rothera / Underdog Exchange via DeFi Rate: volume by category as of Oct 4, 8:30 AM ET.