MA-06 Democratic Primary Winner

$56.9K Vol.Closes Sep 15, 2026

Dan Koh$9.9K Vol.69%

Tram Nguyen$8.3K Vol.29%

Beth Andres-Beck$3K Vol.1%

Kevin Larivee$2.7K Vol.<1%

Dominick Pangallo$7K Vol.<1%

Diann Slavit Baylis$6K Vol.<1%

Seth Moulton$3.1K Vol.<1%

John Beccia$2.8K Vol.<1%

Mariah Lancaster$2.8K Vol.<1%

Jamie Zahlaway Belsito$3.5K Vol.<1%

And 2 more markets on this event.

View on Polymarket

At a glance

What

Dan Koh is competing to win the Democratic nomination for Massachusetts' 6th Congressional District seat in the September 15, 2026 primary, which will vacate as current Rep. Seth Moulton runs for the Senate.

bostonglobe.com masslive.com

Who

Koh is a former Biden White House official and chief of staff to former Boston Mayor and Labor Secretary Marty Walsh, running against a field including Tram Nguyen, Seth Moulton's former chief of staff Rick Jakious, and software engineer Beth Andres-Beck.

bostonglobe.com Politico

Context

The race is defined by Koh's deep Washington experience and massive early fundraising, which has drawn attacks from competitors who view his national ties as a potential vulnerability or advantage depending on voter priorities.

bostonglobe.com predictionedge.com

Stakes

Winning this nomination positions a candidate to contest the general election for a seat that has been a Democratic stronghold, with the winner expected to face Republican opposition in November 2026.

bostonglobe.com masslive.com

Note: While Rick Jakious (Moulton's former chief of staff) dropped out of the race, the field remains competitive with over a dozen candidates vying for the nomination.

Jan 5

Dan Koh reported raising more than $2 million since entering the race in October 2025, claiming the largest early fundraising haul for any Massachusetts House candidate in history.

bostonglobe.com Politico

Mar 27

Koh became the first candidate in the MA-06 race to officially make the ballot by surpassing the requirement of 2,000 certified signatures from all 39 cities and towns in the district.

kohforcongress.com itemlive.com

May 1

Former President Joe Biden officially endorsed Dan Koh in the competitive MA-06 Democratic primary, marking one of over 60 endorsements Koh has secured since launching his campaign.

masslive.com andovermanews.com

Now

Sep 15

The MA-06 Democratic primary election will be held, determining the party's nominee for the U.S. House seat [market description].

AI-generated briefing. AI can make mistakes. This is not financial advice.

Bull case

Dan Koh has secured high-profile endorsements from former President Joe Biden and Vice President Kamala Harris, along with over 80 local elected officials and labor unions, signaling strong establishment and progressive support.
masslive.com kohforcongress.com
His campaign has demonstrated unmatched financial strength, raising over $2 million early and $1 million in a single week, which allows for extensive voter outreach and advertising in the competitive 39-town district.
bostonglobe.com andovermanews.com
Koh was the first candidate to qualify for the ballot by collecting signatures from all 39 municipalities, demonstrating superior organizational capacity and grassroots reach compared to his rivals.
kohforcongress.com itemlive.com

AI-generated briefing. AI can make mistakes. This is not financial advice.

Bear case

Koh faces criticism from opponents who are attacking his national background and 2018 primary loss, potentially framing him as out of touch with local North Shore concerns despite his Andover roots.
bostonglobe.com Ballotpedia
The primary field includes established local figures like state Rep. Tram Nguyen and Jamie Zahlaway Belsito, who may leverage their legislative records and community ties to counter Koh's Washington experience.
bostonglobe.com Politico

2028

MA-06 Democratic Primary Winner

$56.9K Vol.Closes Sep 15, 2026

Dan Koh$9.9K Vol.69%

Tram Nguyen$8.3K Vol.29%

Beth Andres-Beck$3K Vol.1%

Kevin Larivee$2.7K Vol.<1%

Dominick Pangallo$7K Vol.<1%

Diann Slavit Baylis$6K Vol.<1%

Seth Moulton$3.1K Vol.<1%

John Beccia$2.8K Vol.<1%

Mariah Lancaster$2.8K Vol.<1%

Jamie Zahlaway Belsito$3.5K Vol.<1%

And 2 more markets on this event.

View on Polymarket

At a glance

What

bostonglobe.com masslive.com

Who

bostonglobe.com Politico

Context

bostonglobe.com predictionedge.com

Stakes

bostonglobe.com masslive.com

Note: While Rick Jakious (Moulton's former chief of staff) dropped out of the race, the field remains competitive with over a dozen candidates vying for the nomination.

Jan 5

Dan Koh reported raising more than $2 million since entering the race in October 2025, claiming the largest early fundraising haul for any Massachusetts House candidate in history.

bostonglobe.com Politico

Mar 27

Koh became the first candidate in the MA-06 race to officially make the ballot by surpassing the requirement of 2,000 certified signatures from all 39 cities and towns in the district.

kohforcongress.com itemlive.com

May 1

Former President Joe Biden officially endorsed Dan Koh in the competitive MA-06 Democratic primary, marking one of over 60 endorsements Koh has secured since launching his campaign.

masslive.com andovermanews.com

Now

Sep 15

The MA-06 Democratic primary election will be held, determining the party's nominee for the U.S. House seat [market description].

AI-generated briefing. AI can make mistakes. This is not financial advice.

Bull case

Dan Koh has secured high-profile endorsements from former President Joe Biden and Vice President Kamala Harris, along with over 80 local elected officials and labor unions, signaling strong establishment and progressive support.
masslive.com kohforcongress.com
His campaign has demonstrated unmatched financial strength, raising over $2 million early and $1 million in a single week, which allows for extensive voter outreach and advertising in the competitive 39-town district.
bostonglobe.com andovermanews.com
Koh was the first candidate to qualify for the ballot by collecting signatures from all 39 municipalities, demonstrating superior organizational capacity and grassroots reach compared to his rivals.
kohforcongress.com itemlive.com

AI-generated briefing. AI can make mistakes. This is not financial advice.

Bear case

Koh faces criticism from opponents who are attacking his national background and 2018 primary loss, potentially framing him as out of touch with local North Shore concerns despite his Andover roots.
bostonglobe.com Ballotpedia
The primary field includes established local figures like state Rep. Tram Nguyen and Jamie Zahlaway Belsito, who may leverage their legislative records and community ties to counter Koh's Washington experience.
bostonglobe.com Politico

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