Former Marty Walsh Aide Dan Koh Has Lead In Democratic Primary for Third Congressional District, Poll Says

Dan Koh, former chief of staff to Boston Mayor Marty Walsh, has a lead in the crowded Democratic primary to succeed retiring U.S. Representative Nikki Tsongas (D-Lowell).
Koh, 33, drew 19 percent support in the UMass Lowell-Boston Globe poll, over state Senator Barbara L'Italien (D-Andover) and former Obama administration official Rufus Gifford, who tied at 13 percent.