Dan Koh holds a dominant position in the MA-06 Democratic primary, scheduled for September 1, 2026, reflecting his substantial fundraising advantage and campaign infrastructure in an open-seat race. He has raised roughly $4.5 million with several million on hand, enabling sustained broadcast and cable advertising that highlights his federal experience and opposition to Trump administration policies. State Representative Tram Nguyen, the only current officeholder in the field, trails notably despite emphasizing her background as a Vietnamese refugee and local legislative record. Internal polling released in early August showed Koh leading by a wide margin, while other candidates including John Beccia and Beth Andres-Beck remain further behind on name recognition and resources. Trader consensus aligns with these dynamics, as the primary timeline leaves limited room for late shifts absent major new developments.