Dan Koh maintains a commanding position in the MA-06 Democratic primary, scheduled for September 1, 2026, driven by substantial fundraising that has enabled sustained television advertising and a large cash reserve, alongside an internal poll from early August showing him at 34% support among likely voters—nearly double his nearest rivals. As a former Biden administration official and Andover selectman with prior congressional experience, Koh benefits from name recognition and endorsements that have consolidated support in a crowded field. State Representative Tram Nguyen, the sole sitting officeholder, trails as the main alternative, emphasizing her legislative record on housing and local issues but facing a funding disadvantage. Minor candidates remain marginal, with the primary's open nature—following Seth Moulton's Senate bid—amplifying the impact of resources and recent polling on trader assessments of the outcome.