Candidates lob shots during convention Open season on Scott Brown officially kicked off yesterday with five of the six Democratic candidates seeking to reclaim the “people’s seat” training their sights and barbs squarely on the freshman U.S. senator during speeches at their party’s state convention in Lowell. “When Ted Kennedy went behind closed doors with lawmakers and lobbyists, he always fought for us,” Bob Massie, the nonprofit executive who ran unsuccessfully for lieutenant governor in 1994, told some 3,000 Democratic delegates gathered on the floor of Tsongas Center. “When Scott Brown goes behind closed door with lawmakers and lobbyists and...