Former President Biden’s recent endorsement of former aide Dan Koh has strengthened trader consensus around his dominant position in the Massachusetts Sixth Congressional District Democratic primary. The open seat, created by incumbent Seth Moulton’s decision to challenge Senator Ed Markey, drew a crowded field of challengers. Koh’s leading fundraising totals, early collection of the required signatures to qualify for the September 1 ballot, and broad local endorsements have positioned him as the clear favorite in the eyes of prediction-market participants. Other candidates trail significantly, with limited polling and fundraising visibility suggesting narrower paths to the nomination.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedDan Koh 80%
Kevin Larivee 4.8%
Tram Nguyen 3.3%
John Beccia 2.6%
$36,937 Vol.
$36,937 Vol.
Dan Koh
80%
Kevin Larivee
5%
Tram Nguyen
3%
John Beccia
3%
Rachel Creemers
3%
Diann Slavit Baylis
2%
Jamie Zahlaway Belsito
2%
Mariah Lancaster
1%
Seth Moulton
1%
Rick Jakious
1%
Beth Andres-Beck
1%
Dominick Pangallo
<1%
Dan Koh 80%
Kevin Larivee 4.8%
Tram Nguyen 3.3%
John Beccia 2.6%
$36,937 Vol.
$36,937 Vol.
Dan Koh
80%
Kevin Larivee
5%
Tram Nguyen
3%
John Beccia
3%
Rachel Creemers
3%
Diann Slavit Baylis
2%
Jamie Zahlaway Belsito
2%
Mariah Lancaster
1%
Seth Moulton
1%
Rick Jakious
1%
Beth Andres-Beck
1%
Dominick Pangallo
<1%
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.
Market Opened: Nov 25, 2025, 3:39 PM ET
Resolver
0x2F5e3684c...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.
Resolver
0x2F5e3684c...Former President Biden’s recent endorsement of former aide Dan Koh has strengthened trader consensus around his dominant position in the Massachusetts Sixth Congressional District Democratic primary. The open seat, created by incumbent Seth Moulton’s decision to challenge Senator Ed Markey, drew a crowded field of challengers. Koh’s leading fundraising totals, early collection of the required signatures to qualify for the September 1 ballot, and broad local endorsements have positioned him as the clear favorite in the eyes of prediction-market participants. Other candidates trail significantly, with limited polling and fundraising visibility suggesting narrower paths to the nomination.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated



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