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Politics·Primaries

MA-06 Democratic Primary Winner

Market icon
Politics·Primaries

MA-06 Democratic Primary Winner

Dan Koh 76%

Seth Moulton 12.4%

Mariah Lancaster 11.9%

Kevin Larivee 6.9%

Polymarket

$10,085 Vol.

Dan Koh 76%

Seth Moulton 12.4%

Mariah Lancaster 11.9%

Kevin Larivee 6.9%

Polymarket

$10,085 Vol.

Dan Koh

$3,580 Vol.

76%

Seth Moulton

$0 Vol.

12%

Mariah Lancaster

$1,645 Vol.

12%

Kevin Larivee

$1,228 Vol.

7%

Tram Nguyen

$0 Vol.

5%

Diann Slavit Baylis

$0 Vol.

4%

John Beccia

$0 Vol.

3%

Dominick Pangallo

$0 Vol.

3%

Rick Jakious

$2,291 Vol.

2%

Rachel Creemers

$0 Vol.

2%

Jamie Zahlaway Belsito

$0 Vol.

5%

Beth Andres-Beck

$1,341 Vol.

1%

This market will resolve according to the candidate who wins the nomination for the Democratic Party to contest the MA-06 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Democratic primary will take place on September 15, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Democrat sources, including https://democrats.org/. Any replacement of the nominee before election day will not change the resolution of the market.Dan Koh commands 75.5% trader consensus in the MA-06 Democratic primary due to his unmatched fundraising—over $2 million total raised through December 2025 and $312,000 via ActBlue in February alone, capturing 80% of the field's small-dollar contributions—and becoming the first candidate to qualify for the September 1 ballot on March 27 with more than 2,000 signatures across all 39 district municipalities. This open seat race, triggered by Rep. Seth Moulton's bid to challenge Sen. Ed Markey, features a crowded field of over ten Democrats, including state Rep. Tram Nguyen, veterinarian Mariah Lancaster, and attorney John Beccia. Early forums have highlighted divides on health care, immigration, and Iran policy, but Koh's Biden White House tenure and prior local endorsements like ex-Mayor Marty Walsh sustain his momentum ahead of the June filing deadline, with no public polls yet available.

This market will resolve according to the candidate who wins the nomination for the Democratic Party to contest the MA-06 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Democratic primary will take place on September 15, 2026.

If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".

The resolution source for this market will be a consensus of official Democrat sources, including https://democrats.org/.

Any replacement of the nominee before election day will not change the resolution of the market.
Volume
$10,085
End Date
Sep 15, 2026
Market Opened
Nov 25, 2025, 3:39 PM ET

Resolver

0x2F5e3684c...
This market will resolve according to the candidate who wins the nomination for the Democratic Party to contest the MA-06 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Democratic primary will take place on September 15, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Democrat sources, including https://democrats.org/. Any replacement of the nominee before election day will not change the resolution of the market.
This market will resolve according to the candidate who wins the nomination for the Democratic Party to contest the MA-06 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Democratic primary will take place on September 15, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Democrat sources, including https://democrats.org/. Any replacement of the nominee before election day will not change the resolution of the market.Dan Koh commands 75.5% trader consensus in the MA-06 Democratic primary due to his unmatched fundraising—over $2 million total raised through December 2025 and $312,000 via ActBlue in February alone, capturing 80% of the field's small-dollar contributions—and becoming the first candidate to qualify for the September 1 ballot on March 27 with more than 2,000 signatures across all 39 district municipalities. This open seat race, triggered by Rep. Seth Moulton's bid to challenge Sen. Ed Markey, features a crowded field of over ten Democrats, including state Rep. Tram Nguyen, veterinarian Mariah Lancaster, and attorney John Beccia. Early forums have highlighted divides on health care, immigration, and Iran policy, but Koh's Biden White House tenure and prior local endorsements like ex-Mayor Marty Walsh sustain his momentum ahead of the June filing deadline, with no public polls yet available.

This market will resolve according to the candidate who wins the nomination for the Democratic Party to contest the MA-06 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Democratic primary will take place on September 15, 2026.

If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".

The resolution source for this market will be a consensus of official Democrat sources, including https://democrats.org/.

Any replacement of the nominee before election day will not change the resolution of the market.
Volume
$10,085
End Date
Sep 15, 2026
Market Opened
Nov 25, 2025, 3:39 PM ET

Resolver

0x2F5e3684c...
This market will resolve according to the candidate who wins the nomination for the Democratic Party to contest the MA-06 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Democratic primary will take place on September 15, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Democrat sources, including https://democrats.org/. Any replacement of the nominee before election day will not change the resolution of the market.

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Frequently Asked Questions

"MA-06 Democratic Primary Winner" is a prediction market on Polymarket with 12 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Dan Koh" at 76%, followed by "Seth Moulton" at 12%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 76¢ implies that the market collectively assigns a 76% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "MA-06 Democratic Primary Winner" has generated $10.1K in total trading volume since the market launched on Nov 25, 2025. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "MA-06 Democratic Primary Winner," browse the 12 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "MA-06 Democratic Primary Winner" is "Dan Koh" at 76%, meaning the market assigns a 76% chance to that outcome. The next closest outcome is "Seth Moulton" at 12%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "MA-06 Democratic Primary Winner" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.