Dan Koh leads the MA-06 Democratic primary field as the September 1 contest nears, backed by roughly $3.6 million in cash reserves and a series of broadcast ads highlighting his federal experience and opposition to the current administration. An internal poll released in early August showed him ahead by 19 points, reflecting advantages in name recognition and spending capacity over state Representative Tram Nguyen, who emphasizes her legislative record and refugee background in targeted spots. Other candidates, including attorney John Beccia, trail further behind amid a crowded ballot where fundraising gaps and recent advertising waves have consolidated support around the top two contenders. Trader pricing aligns with these resource and polling dynamics in the final weeks.