Former President Joe Biden's endorsement of Dan Koh three days ago has solidified trader consensus behind the former White House aide at 80.5% implied probability to win Massachusetts' 6th Congressional District Democratic primary, an open seat vacated by Rep. Seth Moulton as he challenges Sen. Ed Markey. Koh's fundraising dominance—over $2 million raised early, far outpacing rivals—combined with prior backing from Vice President Kamala Harris and former Boston Mayor Marty Walsh, underscores his frontrunner status in the crowded field. Local contenders like Salem Mayor Dominick Pangallo (6.2%) and others trail amid no public polls, with the September 1 primary looming as the key test of voter turnout in this safely Democratic district.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedDan Koh 81%
Dominick Pangallo 5.6%
Diann Slavit Baylis 5.5%
Kevin Larivee 5.0%
$36,502 Vol.
$36,502 Vol.
Dan Koh
81%
Dominick Pangallo
6%
Diann Slavit Baylis
17%
Kevin Larivee
5%
Tram Nguyen
4%
Rachel Creemers
3%
John Beccia
2%
Jamie Zahlaway Belsito
2%
Mariah Lancaster
1%
Seth Moulton
1%
Rick Jakious
1%
Beth Andres-Beck
<1%
Dan Koh 81%
Dominick Pangallo 5.6%
Diann Slavit Baylis 5.5%
Kevin Larivee 5.0%
$36,502 Vol.
$36,502 Vol.
Dan Koh
81%
Dominick Pangallo
6%
Diann Slavit Baylis
17%
Kevin Larivee
5%
Tram Nguyen
4%
Rachel Creemers
3%
John Beccia
2%
Jamie Zahlaway Belsito
2%
Mariah Lancaster
1%
Seth Moulton
1%
Rick Jakious
1%
Beth Andres-Beck
<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 Joe Biden's endorsement of Dan Koh three days ago has solidified trader consensus behind the former White House aide at 80.5% implied probability to win Massachusetts' 6th Congressional District Democratic primary, an open seat vacated by Rep. Seth Moulton as he challenges Sen. Ed Markey. Koh's fundraising dominance—over $2 million raised early, far outpacing rivals—combined with prior backing from Vice President Kamala Harris and former Boston Mayor Marty Walsh, underscores his frontrunner status in the crowded field. Local contenders like Salem Mayor Dominick Pangallo (6.2%) and others trail amid no public polls, with the September 1 primary looming as the key test of voter turnout in this safely Democratic district.
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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