The polling is in. Niki Tsongas still holds a fairly commanding, though basically unchanged, portion of the electorate: she's got 40%, up from 38% two weeks ago. The big news, though, is Eileen Donoghue, who has jumped from a middling 16% two weeks ago (indistinguishable from Eldridge and Finegold) to 29% now, in sole possession of second place. Eldridge is basically unchanged (from 13% to 15%), and Finegold has slipped a bit (from 14% to 9%). Miceli's got nothin' (3%). The poll shows that "liberals" have gotten much more enthusiastic about Donoghue in the last couple of weeks, though the sample size there is small enough to be only moderately useful.
Keep your eye on this one -- with Donoghue having the means to self-fund some last-minute advertising if she wants to, this could get exciting.