Who will win the Democratic nomination for President in 2028?

TL;DR

Other is the most likely option at 28% because it combines several credible unlisted candidates and every later breakout candidate. Kamala Harris is the leading named candidate at 15%, effectively tied with Gavin Newsom at 15%, followed by Pete Buttigieg at 13% and Josh Shapiro at 13%. Harris’s entry decision is the main pivot: if she runs, she becomes the favorite and Newsom probably stays out; if she does not, Newsom gets the clearest lane.

Context

This forecast uses evidence through September 21, 2026 at 11:42 UTC. No listed contender had filed a new 2028 presidential Statement of Candidacy by that cutoff, which is normal this early and says little by itself (Federal Election Commission).

The official calendar starts with South Carolina on January 22, 2028, then Nevada, New Hampshire, New Mexico, Michigan and Virginia during February (Democratic National Committee). This creates an early test of Black, Latino, labor and Midwestern support rather than allowing a candidate to build momentum first in Iowa and New Hampshire.

Evidence

The historical record says early polling contains information, but entry decisions and campaign development matter just as much. Pew found that early Democratic polling leaders won four of eight open nominations between 1960 and 2004 (Pew Research Center). Gallup’s history shows both kinds of outcome: Al Gore held 63% in September 1999 and won, while Jimmy Carter was below 3% in October 1975 and Bill Clinton had 11% in August 1991 before winning (Gallup). Polls become much stronger later: research covering contested nominations from 1980 through 2000 found that the final pre-Iowa Gallup poll explained roughly 90% of subsequent state-by-state voting, while elite endorsements added information of their own (Brookings).

The current RealClearPolling table contains eight underlying national surveys fielded from July 19 through September 15, with samples ranging from 483 to 24,000 registered or likely voters. Its average is:

The surveys disagree far beyond ordinary sampling error. Harris ranges from 8% to 42%, Buttigieg from 9% to 26%, and Ossoff from 4% to 21%. The main causes are different candidate lists, voter screens and question wording, so I use these figures to identify tiers rather than as direct nomination probabilities (RealClearPolling).

National support is not geographically uniform. New Hampshire’s current average has Buttigieg at 22%, AOC at 17% and Harris at 5.3% (RealClearPolling). But New Hampshire is third in the sanctioned calendar. South Carolina first helps Harris if she runs and immediately tests Buttigieg’s weakest 2020 constituency. Buttigieg’s August trip to South Carolina specifically focused on rebuilding ties with Black voters and followed a visit to Nevada (Associated Press).

I estimate serious-entry probabilities separately from the chance of winning after entry. These estimates are correlated and do not sum to 100%:

• Harris: 40.0%. Axios surveyed eight former aides and advisers: one expected her to run, two called it a toss-up and five expected her to stay out. She remains undecided and has increased calls to party officials, but has not shown the staffing, travel or policy rollout of a committed campaign (Axios; CNN).
• Newsom: 58%. He explicitly said he would not run if Harris runs, citing their overlapping supporters and donors. At the same time, he has made targeted early-state investments and raised more than $1.7 million for 14 state parties, including over $300,000 for South Carolina (Axios on his Harris pledge; Axios on state-party fundraising).
• Buttigieg: 80%. His repeated national campaigning, Nevada and South Carolina travel, prior presidential experience and work on his Black-voter weakness make him the clearest likely entrant among the listed candidates (Associated Press).
• Shapiro: 70%. His path runs through reelection. An August Pennsylvania poll had him leading Stacy Garrity 55% to 39%; a decisive victory would give him a strong electability case from a central battleground state (Siena Research Institute).
• AOC: 60%. Her national travel and outreach to Black political institutions look presidential, but she has also left open a 2028 Senate challenge to Chuck Schumer (Axios on her national activity; Axios on her two options).
• Ossoff: 15%. He has repeatedly said he has zero interest in running, and his immediate task is Senate reelection. A September 14–16 survey of 645 likely Georgia voters put him ahead of Mike Collins by roughly four points, so even his political future is not settled yet (Atlanta Journal-Constitution report; Atlanta News First poll report).
• Whitmer: 12%. She said running was not on her list and that she planned to take time away after leaving office, then preserved a small opening with never say never (Michigan Public).

I converted these signals into three scenarios. Harris runs with 40.0% probability. Harris stays out and Newsom runs with 52.2% probability. Neither runs with 8% probability. Within each scenario I allocated nomination shares using polling, entry intent, coalition breadth, early-state fit, organization and the historical chance of a later-emerging candidate. I also retained a small Newsom path in the Harris-entry branch because public promises can break if circumstances change.

What's non-obvious

The obvious mistake is treating current preference polling as nomination probability. Harris’s 24.1% polling average becomes a 15% nomination forecast because she is more likely than not to stay out. Ossoff’s 8.8% becomes 4% because his direct denials and Senate obligations sharply reduce his entry probability. Shapiro moves the other way: his 6.3% current polling becomes 13% because a large Pennsylvania reelection win could change his national standing quickly (RealClearPolling; Siena Research Institute).

The Other category is not leftover uncertainty. Unlisted candidates already command at least 15.1% in the current average, and Andy Beshear has begun a national book tour while discussing the agenda he would run on, though he denies reports of an imminent announcement (RealClearPolling; Axios). Because Other combines Beshear, Mark Kelly, J.B. Pritzker, Wes Moore, Cory Booker and every unforeseen entrant, it is more likely than any one named candidate.

Uncertainties

The weakest evidence is in the states that vote first. Public polling is extensive nationally and in New Hampshire, but I found no usable current 2026 Democratic-primary poll for South Carolina, Nevada, New Mexico or Virginia. That makes calendar effects more inferential than measured.

The November midterms will supply the next major evidence. Shapiro’s margin will test his swing-state argument. Ossoff’s result will determine whether a rapid national pivot is even plausible. The other decisive signals are Harris’s announcement, whether Newsom honors his pledge, AOC’s president-versus-Senate choice, and post-midterm staff hiring, endorsements and travel in the official early states. Until those arrive, differences of a few percentage points among the leading named candidates should not be treated as robust.