Dan Koh holds a commanding lead in the Massachusetts Sixth Congressional District Democratic primary due to his extensive prior campaign experience, established fundraising base, and broad endorsements from local Democratic organizations. These advantages have shaped trader consensus around his strong path to the September primary nomination. Trailing candidates such as Rachel Creemers, Tram Nguyen, and John Beccia show limited district visibility and resources, keeping their implied probabilities low. No major developments in the past thirty days have altered this positioning, leaving the market reflective of Koh's structural advantages in name recognition and institutional support while remaining open to shifts from upcoming debates or late fundraising reports.