2028 presidential election odds: Ossoff 21.2% vs Vance 20.5%

The 2026 midterms settled on Wednesday night, and within two days the prediction-market money that had been parked on control of Congress is trading somewhere new: the 2028 presidential race. Polymarket's 2028 books have become the venue's busiest political action by 24-hour volume, and the early pricing already carries a few surprises about who the next cycle's front-runners are.

Let me be precise about the sources. These are the live probabilities on Polymarket's 2028 event pages as of the morning of November 6, pulled from the venue's own market data. They are expectations, not predictions of mine: they tell you what the crowd currently prices, and they will move as the field takes shape. That is the whole point of this desk's coverage, and it is a point that matters more right now than it has all year, because the market is pricing a cycle that does not officially start for two years.

Related reading: 2026 midterm election odds: Polymarket prices a Democratic Congress sweep at 66.5 percent.

Start with the general election, the coarsest and most liquid of the three 2028 books. Jon Ossoff, the Georgia senator whose 2026 campaign the politically attentive just watched, sits at 21.2% to win the presidency. JD Vance, the sitting vice president, is at 20.5%. Those two account for the top of a book where Marco Rubio sits at 9.2%, Ron DeSantis at 5.8%, and Gavin Newsom at 7.3%. That near-tie at the top is the notable print: a Democratic senator few would have named a national front-runner a year ago is trading even with a sitting vice president.

The Democratic nomination market sharpens the picture and explains the general-book surprise. There Ossoff is not merely competitive, he is the favorite, at 27.2%. Alexandria Ocasio-Cortez is next at 17.3%, Gavin Newsom at 12.5%, Kamala Harris at 4.8%, Pete Buttigieg at 4.5% and Josh Shapiro at 4.2%. The reason Ossoff can top the general-election book while trailing in name recognition compared with a governor of California or a former speaker-in-waiting is arithmetic as much as affection: an early Democratic leader collects more of the nomination probability, and the general market then prices that leader's path forward.

Related reading: Midterm markets narrow to a Senate call as the House is near the board.

On the Republican side the market is less of a mystery. JD Vance leads the GOP nomination at 38.9%, a healthy margin over Marco Rubio at 19.1% and Ron DeSantis at 13.3%. That is a bigger lead than the general-election gap would suggest, which is exactly what you would expect from an incumbent vice president consolidating a party that just swept a midterm. The notable feature is how spread out the field remains: Glenn Youngkin at 3.4%, Donald Trump Jr. at 1.7%, and a long tail of names below that show a primary with real distance still to travel.

The venue angle is worth stating plainly. Polymarket is where this volume is happening: the 2028 presidential, nomination and general-event families drew some of the highest 24-hour activity on the whole exchange on November 6, with individual contracts like the Vance-to-win-presidency trade showing multi-million-dollar lifetime volume and hundreds of thousands in fresh daily money. Kalshi's election API, by contrast, surfaced no directly comparable 2028 presidential series in its open list this morning, so for now Polymarket is the venue where the next cycle's expectations actually live. A reader who wants a second tape to check these numbers against does not have one yet, and that single-venue concentration is itself information about how early and how thin this market still is.

Related reading: 2026 midterm odds: split Congress now 26.5 percent on Polymarket.

Let me also flag what could break this pricing, because an early market's confidence is easy to overstate. All three of these books resolve to a nominee or a president that will only be chosen years from now, so the probabilities carry enormous policy, personnel and health uncertainty that no contract on a candidate name can hedge. More immediately, every marginal dollar that rotates into these books from the settled midterms is fresh money chasing long, illiquid tails; a handful of large trades can move a 2% price to 5% without any news at all. The tail is genuinely long here, Harry Truman's famous 1948 lead being the textbook caution: at this distance the market is pricing name recognition and momentum, not certainty.

What to watch next is the calendar, not the sound. The next meaningful repricing should come when announced candidates, primary calendars and first-quarter fundraising disclosures land in 2027, each of which will compress the field in ways a 2026 book cannot anticipate. Until then these contracts are a temperature reading on a field that has barely formed. The useful number to carry forward is the one this desk will keep tracking: two names trading above 20% for a president to be elected two years out, with a sitting vice president and a Georgia senator the early poles and two full years of campaign shocks still to price.

Related reading: 2026 midterm odds: Democratic sweep firms to 68.5%.

This content is for informational purposes only and does not constitute financial advice. Past performance is not indicative of future results. Consult a qualified financial advisor before making investment decisions.