Dan Koh leads the MA-06 Democratic primary with strong trader consensus, driven by his substantial fundraising edge—over $4.5 million raised with roughly $3.6 million cash on hand—which has funded sustained television and cable ads framing him as an experienced opponent of the current administration. As a former Biden administration official and Andover selectman, Koh benefits from name recognition and Washington ties in a race where most candidates lack comparable resources. State Representative Tram Nguyen, the only sitting officeholder, trails due to a narrower financial base despite her legislative record and refugee background, though she has aired initial spots and secured some local support. An early spring poll showed a crowded field with nearly half of voters undecided, but recent internal surveys indicate Koh pulling ahead as the September 1 primary approaches. Minor candidates remain marginal amid the resource gap.