Looks like one of his sons is getting ready to run for Congress.
Aug 24, 2017
Daniel Arrigg Koh will leave leaving City Hall at the end of the month, in the midst of the mayor's re-election campaign, to prepare to run for Congress next year, according to City Hall and sources familiar with the 32-year-old's plans.
Walsh's office announced Koh's intention to step down on Sept. 1 last Friday afternoon as Koh prepares for what two sources close to City Hall described as an expected run for Congress next year in Massachusetts's Third Congressional District. The city's chief financial officer Dave Sweeney will take over as chief of staff.
U.S. Rep. Niki Tsongas announced recently that she would not seek a sixth full term in Congress in 2018, creating a rare opening in the delegation that has drawn interest from a number of current and former elected officials from the Merrimack Valley.
http:// www.andovertownsman.com/news/dan-koh-former-andover-resident-leaves-boston-city-hall-job/article_d3da9420-901b-5bab-9cbc-4b2d6fe3c624.html