Democrat Dan Koh is projected to win Massachusetts's 6th Congressional District, according to Decision Desk HQ, securing the seat vacated by Rep. Seth Moulton (D-MA). Koh, a former Biden administration official, defeated Republican Micah Jones, an Army veteran and attorney.
With polls closing at 8 p.m. EST, DDHQ called the race for Koh almost immediately, reflecting the district's strong Democratic lean. Koh's victory was widely anticipated after he emerged from a competitive Democratic primary earlier this year.
Koh's campaign drew significant backing from prominent figures in the previous Democratic administration, including former President Joe Biden, former Vice President Kamala Harris, former Transportation Secretary Pete Buttigieg, and former Labor Secretary Marty Walsh. This high-profile support underscored Koh's establishment credentials and his deep ties to the party's leadership.
Koh's political resume includes serving as chief of staff to Walsh during Walsh's tenure as Boston mayor. He first ran for Congress in 2018 but narrowly lost the Democratic primary to Rep. Lori Trahan (D-MA). After that setback, Koh joined the Biden administration, where he again worked under Walsh at the Labor Department before moving to the White House as deputy assistant to the president and deputy director of the Office of Intergovernmental Affairs.
The 6th District seat opened when Moulton chose not to seek reelection, instead mounting a primary challenge to Sen. Ed Markey (D-MA). Moulton's bid failed, allowing Markey to secure the nomination and ultimately retain his Senate seat.
Koh's victory adds to the Democrats' efforts to hold onto suburban seats in the Northeast, a region that has become increasingly reliable for the party. His win also reflects the continued influence of Biden-era officials in congressional races, even as the party navigates a post-Biden landscape.
In a statement, Koh thanked voters for their trust and pledged to focus on issues like economic opportunity, healthcare access, and infrastructure. "This district deserves a representative who will fight for working families and deliver results," he said.
The race in Massachusetts's 6th District was not considered competitive, but it was closely watched as part of the broader national picture. With Democrats already celebrating wins in other races, such as Allred's return to the House from Texas and Wasserman Schultz's projected win in Florida, Koh's victory adds to the party's momentum.
Koh will take office in January, joining a freshman class that includes several other new members, such as Pastor Frederick Haynes in Texas and Gilbert in Florida's 24th District. His arrival signals continuity for the district, which has been in Democratic hands for over a decade.
