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Who will win the 2026 Massachusetts Senate Democratic Primary?

Sep 16, 2026, 3:59am UTC, in 107 daysLast updated: Jun 1, 2026, 4:23 AM UTC

Massachusetts Democratic Senate nominee?

$50.9K

SEP 16, 2026

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Party selects its nominee.

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OddsCurrent Odds

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Total volume

$50.9K

24h volume

$33

E. Markey83%

S. Moulton19%

A. Rikleen2%

Loading chart data...

source: Kalshi

Upcoming Events

September

TUE 1

Massachusetts 2026 primary

November

TUE 3

Massachusetts 2026 general election

Latest Insights

Seth Moulton

26%24H14%

AP confirmed Markey won the Massachusetts Democratic convention endorsement while Moulton cleared the ballot threshold, reinforcing Markey’s edge and keeping Moulton under pressure at 14%.

Markey’s decisive convention endorsement, alongside Moulton clearing only the ballot threshold, keeps the incumbent firmly in control of the Massachusetts Democratic Senate race and pushes Moulton to 14%.

Seth Moulton

0%24H14%

Markey’s party endorsement and Moulton’s ballot qualification kept the race centered on the incumbent, with Moulton now down to 14% in the nominee market.

News

AINews Summary

Ed Markey won the state party endorsement in the Massachusetts Democratic Senate primary, while Seth Moulton secured a spot on the ballot. Recent polling still shows Markey ahead, but the race remains competitive with many undecided voters and outside groups already active. Markey’s endorsement and polling lead likely give him a modest edge. But the race still looks competitive, with a large undecided share keeping uncertainty high.

Articles

UNU.S. News & World Report2 days ago

Markey Wins Massachusetts Democrats’ Endorsement as Moulton Clears Ballot Hurdle in Senate Race

WORCESTER, Mass. (AP) — U.S. Rep. Seth Moulton, a moderate Massachusetts Democrat, secured enough delegate support Saturday to appear on the state’s primary ballot as he challenges incumbent U.S. Sen. Ed Markey in this year’s Senate race.

TBThe Boston Globe11 days ago

Senate race may be 'closer than people think'

This year’s US Senate primary has largely hummed to at a lower wattage despite some signs it’s starting to heat up.

NNPR21 hours ago

Iowa's red state status in question with competitive midterms : NPR

Iowa is no stranger to political attention in presidential elections, but surprisingly competitive midterm contests highlight the state's importance for both parties as it holds its primary Tuesday.

TIThe Intercept3 days ago

Graham Platner Is Forcing Centrist Dems to Confront "Vote Blue No Matter Who"

Rep. Jake Auchincloss urging voters not to support Democrat Graham Platner in the Maine Senate race shows the limits of party unity.

FNFox News5 days ago

Rep Jake Auchincloss faces bipartisan backlash after softening Graham Platner criticism

Rep. Jake Auchincloss drew bipartisan backlash after appearing to soften his criticism of Maine Senate nominee Graham Platner's Nazi-linked tattoo.

NYNew York Post6 days ago

Jake Auchincloss ripped by Democrats for calling Graham Platner's Nazi tattoo disqualifying

Democratic Rep. Jake Auchincloss of Massachusetts is facing a torrent of backlash from the left for having the audacity to call Maine Dem Senate hopeful Graham Platner's onetime Nazi tattoo and his excuse about it "disqualifying."

WWJLA14 days ago

Romney reacts to Cassidy's primary defeat: 'Loss for the country'

The retired Utah senator showed sympathy for his former colleague, who lost his first primary election since supporting an effort to remove Trump from office.

WWJLA19 days ago

Candidates for DC Delegate talk statehood, federal oversight at weekend forum

Four candidates seeking to succeed longtime DC Delegate Eleanor Holmes Norton squared off in Sunday forum.

MMassLive25 days ago

Mass. nailbiter?: Moulton pulls within 5 points of Markey in new poll

The 47-year-old congressman trails 79-year-old Ed Markey among the very demographic he's courting most aggressively, setting up a summer battle for the hearts and minds of Democratic primary voters.

TBThe Boston Globe25 days ago

What Graham Platner means for the Democratic Party

We asked our three writers: Is Platner just what the Democratic Party needs right now to take back the Senate? Or is he a disaster-in-waiting for the party?

Polls

Polling Average

25%20%15%10%5%0%

22.5%

5.5%

A. Pressley

A. Rikleen

Date (Start - End)	Spread	Pressley	Rikleen
Polling Average	Pressley+17.0	22.5%	5.5%
University of Massachusetts Department of Political Science/YouGovOct 21 - 29	Pressley+18.0	24.0%	6.0%
University of Massachusetts Department of Political Science/YouGovOct 21 - 29	Pressley+16.0	21.0%	5.0%

Aggregation source: FiftyPlusOne

Fundraising

Total RaisedCash on Hand

Mar 31, 2026

$5M

$3.8M

$2.5M

$1.3M

E. Markey

A. Pressley

A. Rikleen

Candidate

Total Raised

Cash on Hand

Burn Rate (per month)

Last report

E. MarkeyEd Markey

$3.80MContrib: $2.19M

$2.54MSpent: $3.07M

$204.9KLast period: $440.7K

APRIL QUARTERLY · Mar 31, 2026

A. PressleyAyanna Pressley

$914.5KContrib: $812.6K

$138.1KSpent: $894.6K

$59.6KLast period: $204.9K

APRIL QUARTERLY · Mar 31, 2026

A. RikleenAlexander Rikleen

$75.7KContrib: $51.8K

$2.7KSpent: $73.0K

$4.9KLast period: $5.7K

APRIL QUARTERLY · Mar 31, 2026

Source: FEC

New updates coming soon

We're monitoring and will update when new data impacts the race.

Endorsements

Who will win the 2026 Massachusetts Senate Democratic Primary?

Massachusetts Democratic Senate nominee?

OddsCurrent Odds

Upcoming Events

Latest Insights

Seth Moulton

Seth Moulton

Seth Moulton

News

Markey Wins Massachusetts Democrats’ Endorsement as Moulton Clears Ballot Hurdle in Senate Race

Senate race may be 'closer than people think'

Iowa's red state status in question with competitive midterms : NPR

Graham Platner Is Forcing Centrist Dems to Confront "Vote Blue No Matter Who"

Rep Jake Auchincloss faces bipartisan backlash after softening Graham Platner criticism

Jake Auchincloss ripped by Democrats for calling Graham Platner's Nazi tattoo disqualifying

Romney reacts to Cassidy's primary defeat: 'Loss for the country'

Candidates for DC Delegate talk statehood, federal oversight at weekend forum

Mass. nailbiter?: Moulton pulls within 5 points of Markey in new poll

What Graham Platner means for the Democratic Party

Polls

Fundraising

Related races

Massachusetts Governor winner?

MA-01 Democratic nominee?

Massachusetts Republican Governor nominee?

MA-09 Democratic nominee?

Upcoming Events

Latest Insights

Seth Moulton

Seth Moulton

Seth Moulton

News

Markey Wins Massachusetts Democrats’ Endorsement as Moulton Clears Ballot Hurdle in Senate Race

Senate race may be 'closer than people think'

Iowa's red state status in question with competitive midterms : NPR

Graham Platner Is Forcing Centrist Dems to Confront "Vote Blue No Matter Who"

Rep Jake Auchincloss faces bipartisan backlash after softening Graham Platner criticism

Jake Auchincloss ripped by Democrats for calling Graham Platner's Nazi tattoo disqualifying

Romney reacts to Cassidy's primary defeat: 'Loss for the country'

Candidates for DC Delegate talk statehood, federal oversight at weekend forum

Mass. nailbiter?: Moulton pulls within 5 points of Markey in new poll

What Graham Platner means for the Democratic Party

Polls

Fundraising

Related races

Massachusetts Governor winner?

MA-01 Democratic nominee?

Massachusetts Republican Governor nominee?

MA-09 Democratic nominee?