Democratic Presidential Nominee 2028: Polymarket vs Kalshi
Jon Ossoff leads at 27.3¢ on Polymarket against 25.5¢ on Kalshi. 1 outcome currently differ by 3 points or more between the two venues — the kind of gap that can survive fees and taxes.
Poly
KalshiDiff
Jon Ossoff▼0.627.3¢25.5¢+1.8
Alexandria Ocasio-Cortez▲2.817.3¢13.5¢+3.8
Gavin Newsom▼1.412.7¢12.5¢+0.1
Kamala Harris▼0.14.7¢5.1¢-0.4
Pete Buttigieg▼0.34.5¢5.1¢-0.6
Josh Shapiro▼1.14.2¢4.5¢-0.3
Andy Beshear▲0.53.8¢4.5¢-0.8
James Talarico▼0.72.9¢3.6¢-0.8
Raphael Warnock2.3¢2.4¢-0.1
Wes Moore▲0.62.1¢2.6¢-0.4
Mark Kelly▼0.31.9¢3.6¢-1.6
Ro Khanna▲0.11.5¢1.4¢+0.1
J.B. Pritzker1.4¢1.9¢-0.6
Rahm Emanuel1.3¢1.7¢-0.5
Roy Cooper0.7¢0.5¢+0.1
Michelle Obama0.7¢1.0¢-0.4
Gretchen Whitmer0.7¢0.5¢+0.1
Dwayne 'The Rock' Johnson▼0.30.6¢0.1¢+0.5
Cory Booker0.5¢0.8¢-0.2
Chris Van Hollen▲0.30.5¢0.3¢+0.2
Abdul El-Sayed▼49.00.5¢2.9¢-2.4
Bernie Sanders▼0.20.4¢0.5¢0.0
Mark Cuban0.4¢0.7¢-0.2
Ruben Gallego0.4¢0.5¢-0.2
Jon Stewart0.4¢0.3¢+0.1
Adam Hamilton0.3¢0.3¢0.0
Chris Murphy0.3¢0.3¢0.0
Hillary Clinton0.3¢0.1¢—
Abigail Spanberger0.1¢0.1¢0.0
Scott Colom▼48.40.1¢0.1¢0.0
Hakeem Jeffries0.1¢0.1¢0.0
Mitch Landrieu0.1¢0.1¢—
Jasmine Crockett0.1¢0.1¢—
Elissa Slotkin0.1¢0.5¢-0.3
Hunter Biden0.1¢0.1¢0.0
Zohran Mamdani0.1¢0.1¢0.0
Phil Murphy0.1¢0.1¢0.0
Gina Raimondo0.1¢0.1¢—
Barack Obama0.1¢0.3¢-0.1
Jared Polis0.1¢0.1¢—
Stephen A. Smith0.1¢0.3¢-0.1
Graham Platner0.1¢0.1¢—
Beto O’Rourke0.1¢0.1¢-0.1
Andrew Yang0.1¢0.1¢-0.1
LeBron James0.1¢0.1¢—
Liz Cheney0.1¢0.1¢—
John Fetterman0.1¢0.1¢-0.1
Tim Walz0.1¢0.1¢-0.1Polymarket shows the last traded price; Kalshi shows the bid/ask midpoint. Where the Kalshi book is too wide to compare, the raw bid–ask range is shown instead and no difference is reported. Prices move continuously — confirm on the venue before trading.
Where to trade this
Polymarket review
USDC settlement, taker fees 0.75–1.80%, no interest on balances.
Kalshi review
CFTC-regulated, USD settlement, about 4% APY on idle cash.
Deciding between them? Read the full Polymarket vs Kalshi comparison, or see the best prediction market apps.
Democratic Presidential Nominee 2028 odds explained
The table above prices Democratic Presidential Nominee 2028 on Polymarket and Kalshi at the same moment. Each figure is what one contract costs in cents, so 52.0¢ means the market implies a 52% chance. Contracts settle at $1, which makes the price and the implied probability the same number.
The two venues run separate order books, so the same outcome can sit several points apart. Where the gap reaches three points it is worth a look: that is roughly what a difference needs to be to survive Polymarket's 0.75–1.80% taker fee and Kalshi's per-contract charge. Our prediction market arbitrage guide covers how to trade a gap without getting caught with one leg filled.
Frequently asked questions
Where can I get the best odds on Democratic Presidential Nominee 2028?
The table above prices Democratic Presidential Nominee 2028 on both venues, refreshed every ten minutes, with the cheaper side highlighted for each outcome. It is often not the same venue across the whole board.
Is there an arbitrage opportunity on Democratic Presidential Nominee 2028?
Differences of three points or more are flagged above — roughly what a gap needs to survive fees on both sides. Smaller ones are shown but rarely worth acting on; the arbitrage guide covers the execution risk.
Who is favourite in Democratic Presidential Nominee 2028?
Jon Ossoff carries the highest implied probability on Polymarket right now. The ranking reflects the most recent sync and moves with the market.
Do I owe tax on profits from this market?
Yes. Kalshi issues a 1099-MISC and Polymarket issues nothing, and there is no IRS guidance specific to prediction markets — see the tax guide.
More politics odds, or every market we track on the Polymarket vs Kalshi comparison. New to this? Start with how prediction markets work and the best prediction market apps.