Who will win the Democratic nomination for President in 2028?

TL;DR

Kamala Harris is the narrow single-name favorite at 18%, while Other is the largest option at 27%. Gavin Newsom is at 16%, Pete Buttigieg at 16%, and Josh Shapiro at 13%. Harris's entry decision controls the race because Newsom says he will not run against her, while AOC's Senate track and the Ossoff and Whitmer denials sharply reduce their presidential odds.

Context

This forecast uses evidence available through September 28, 2026, at 11:51 UTC. None of the seven listed politicians has formally filed a 2028 presidential candidacy with the Federal Election Commission. The forecast concerns the person formally nominated, so a presumptive nominee who withdraws before the convention would not count.

The DNC-approved calendar starts with South Carolina on January 22, 2028, followed by Nevada, New Hampshire, New Mexico, Michigan, and Virginia. This makes candidate entry, Black-voter support, early-state organization, and momentum more useful than national name recognition alone.

Evidence

The historical backbone argues against confidence in any current leader. Gallup's full review of 12 non-incumbent Democratic nomination races from 1956 through 2016 found that only four eventual nominees led continuously from the preceding year; eight established a sustained lead only after the election year began. Pew's separate study found that early Democratic leaders won four of eight open contests from 1960 through 2004. The samples are small and include nomination systems unlike today's, but the message is stable: an early lead is an asset, not a calibrated winning probability.

Harris does have a real polling advantage. The RealClearPolling average, covering eight polls fielded from July 19 through September 21, has Harris at 24.9%, Newsom 14.0%, Buttigieg 12.8%, AOC 10.7%, Ossoff 9.1%, Shapiro 5.8%, and Whitmer 2.5%. The people grouped under Other, including Mark Kelly, Andy Beshear, and JB Pritzker, account for the remaining 20.2%. Poll construction drives huge variation: Harris ranges from 8% to 42%, while Buttigieg ranges from 9% to 26%.

The sample labels require care. The September 13–15 Big Data Poll had 1,329 likely Democratic-primary voters, not the 2,633 voters in the full survey; it found Harris 26.7%, Newsom 16.1%, Buttigieg and AOC 10.3% each, Ossoff 6.4%, Shapiro 5.5%, and Whitmer 2.5%. The September 17–21 Echelon survey, released September 23, used 491 Democrats or Democratic-leaning independents inside a 1,002-person likely-voter sample; it found Harris 24%, Newsom 14%, Buttigieg 10%, Ossoff 8%, AOC 7%, Shapiro 3%, and Whitmer 2%. These are measures of current preference and familiarity, not nominee probabilities.

The available early-state evidence is mixed. In Saint Anselm College's August 17–18 New Hampshire poll, Buttigieg had 25%, AOC 17%, Ossoff 12%, Newsom 7%, and Harris 3% among roughly 733 Democratic-primary respondents within a 1,411-person statewide sample. In the July 8–11 Michigan poll, Harris led Buttigieg 25% to 19%, followed by AOC at 12% and Newsom at 10%, among 500 likely Democratic-primary voters. There is no comparable current public ballot test for South Carolina, so Harris's presumed first-state advantage is an inference from coalition history and national support, not an observed statewide lead.

Entry is the largest forecast lever. Axios interviewed eight former Harris aides and advisers on September 20: five thought she probably would not run, two called it even, and one expected her to run. Some acknowledged that they might be expressing a preference rather than private knowledge. Harris is campaigning in Michigan, Nevada, and Georgia, but the Associated Press reported that her travel remained lighter than Buttigieg's. I assign a 47% chance that she launches a serious campaign.

Newsom is the clearest conditional candidate. His September South Carolina schedule looked like a campaign, including eight public events and additional private meetings, and people close to him described the presidency as the next step in AP's September 6 report. But he then told CNN that he would not enter if Harris ran. I assign Newsom a 92% entry probability if Harris stays out and 4% if she runs.

Buttigieg is the likeliest listed candidate to enter. He declined both major Michigan races in 2026, said in August that he was more inclined than not to run, and visited Nevada and South Carolina in consecutive weeks. His South Carolina trip was a rational attempt to repair the Black-voter weakness that ended his 2020 campaign. He has a strong path to running, but South Carolina voting first limits his conditional chance of winning.

Shapiro has the best current fundamentals relative to his modest national polling. A September 15–22 Siena poll of 615 likely Pennsylvania voters put him ahead in his reelection race by 58% to 38%. His January memoir introduced a national biography and revisited his friction with Harris's 2024 vice-presidential vetting team, according to the Washington Post. A large November victory would create a strong swing-state electability argument, though it would not itself establish support in South Carolina.

AOC's presidential option remains real, but her Senate option now has more visible infrastructure. On September 27, Axios reported that she was touring upstate New York, meeting local officials, and launching a turnout operation that could generate data for a statewide campaign. The same report found that some early-state Democrats had not heard from her. I therefore put her below forecasts that treat her as a near-certain presidential entrant.

Ossoff and Whitmer receive steep entry discounts. Ossoff said in a June 28 CNN interview that he was not running and had no interest in running, then repeated the position during his Senate campaign. Whitmer said on May 28 that a presidential run was not on her list, although she added “never say never” later that day, as reported by Michigan Public. Strategic denials can be reversed, but repeated and unusually direct language contains information.

I used a scenario mixture rather than converting poll shares directly into probabilities. The calculation is

$$P(i)=\sum_s P(s)P(i\mid s),$$

where $s$ represents the four Harris–Newsom entry combinations. My scenario weights are 45.1% for Harris running without Newsom, 2% for both running, 48.8% for Newsom running without Harris, and 4% for neither running. Conditional on Harris running alone, I give her 39.0%; conditional on Newsom running without Harris, I give him 33.0%. Buttigieg receives 15–21% across the four scenarios, Shapiro 10–17%, and Other 20–50%, with the largest Other allocation occurring when both Californians stay out. The reported probability fields are the exact weighted arithmetic; their extra decimals do not represent equivalent political precision.

What's non-obvious

The largest option is Other, but that is not a claim that an unknown person is individually favored. It pools several credible politicians. In the current national average, Mark Kelly alone has 6.8%, Beshear 4.0%, and Pritzker 2.8%. Wes Moore, Cory Booker, Raphael Warnock, and a post-midterm breakout candidate add further mass. A category containing six or more plausible people should beat any single candidate this early.

Newsom's deference helps Harris, but it does not make her nomination probability equal to her polling share. Nearly half of her probability loss occurs before voting: she may not run. The South Carolina-first calendar also does less for her than much coverage assumes because current public South Carolina candidate polling is absent. Conversely, New Hampshire headlines overstate Buttigieg and AOC because South Carolina and Nevada vote first under the official calendar.

Uncertainties

The November 3, 2026 midterms are the next major information event. Shapiro's margin, Ossoff's reelection result, candidate coattails, and which national surrogates prove useful to Democratic campaigns will change both entry incentives and electability narratives.

Public polling remains thin in South Carolina, Nevada, New Mexico, and Virginia. Polls also use different candidate lists and sometimes publish the full survey size rather than the much smaller Democratic-primary subgroup. New Hampshire presents an additional process risk: state law conflicts with its DNC-assigned date, and state officials have resisted the approved order, according to New Hampshire Public Radio. Better South Carolina polling, post-midterm staffing records, federal PAC filings, and explicit candidate decisions would close most of the present gap.