Dan Koh leads the September 1 Democratic primary for Massachusetts’ 6th Congressional District with a substantial fundraising edge, having raised roughly $4.5 million and retaining the largest cash reserve to sustain broadcast and cable advertising. Recent internal polling from his campaign shows him at 34 percent support, ahead of John Beccia and Tram Nguyen. Nguyen, the sole sitting state representative in the field, trails in ad volume but highlights her legislative record and personal background as the primary alternative. Earlier surveys showed a tighter contest with higher undecided shares, but Koh’s resource advantage and consistent messaging on opposing the Trump administration have consolidated support in the final weeks. The remaining candidates trail significantly in both fundraising and name recognition.