Dan Koh dominates trader consensus at 74% implied probability in the MA-06 Democratic primary, propelled by his campaign's recent internal poll showing a 20-point lead over incumbent Seth Moulton and superior fundraising with over $1 million raised in Q2, affording aggressive ad buys in the final stretch before the September 3 vote. Moulton, at 11.8%, faces skepticism from local party leaders despite his incumbency advantage and national profile, with endorsements tilting toward Koh from key state representatives and mayors emphasizing district priorities like housing and jobs. Progressive challenger Jamie Zahlaway Belsito holds 9.6% amid scattered field support, while others trail as lower-tier contenders; no major polls have emerged in the past week, leaving momentum and turnout as pivotal for this closely watched moderate vs. establishment contest.