WBURreleased a poll that MassINC had done for them for a special election in 2013. The poll looked at the favorables of Scott Brown and a few other Republicans(Bill Weld and Charlie Baker) and also quite a few Democrats(Governor Deval Patrick, Attorney General and 2010 special election loser Martha Coakley, Rep. Edward Markey, Rep. Michael Capuano, Rep. Stephen Lynch and ex-Rep. Marty Meehan).
The poll surveyed 500 registered voters and was 36D-11R-53I. The toplines(contains PDF) also show a gender mix of 52% female/48% male and breakdown in age was 18% 18-29, 25% 30-44%, 29% 45-59, 28% 60+. There is no listing for Obama voters that I could find. Crosstabs are here. (Contains PDF)
The poll found that Scott Brown has a 58/28 favorable and unfavorable. Brown has the highest favorable for any not named Deval Patrick, who has a pretty sweet 60/26. The Democrat with the next highest favorable was Martha Coakley with 48/27. Of the Congresspeople: Markey and Lynch both have 24/12 with Lynch getting the higher amount of heard of/undecided with 34%(Markey's was 27%) and Markey having 33% never heard of. (Lynch gets 27% there). Capuano was 23/11 with 34% and 30% with undecided and never heard of. Meehan was 21/12 with 27% and 36% so Meehan would have to biggest challenge is getting his name out there.
As far as head to head: Brown would get 51% against Coakley or Lynch, 49% against Meehan, 48% percent against Markey, and 47% against Patrick or Capuano. If you look at just the Democratic candidate's numbers Patrick would get 40% Coakley would have 36% against Brown, and 30% would vote for Markey or Meehan. Capuano would count on 28% and Lynch gets the lowest one with 24%. The Don't Know numbers on Markey, Capuano, Lynch and Meehan are around 15% so they could make up a lot of ground if there isn't a tough primary and the Democratic candidate could define himself or herself to the voters.
Overall, it seems like a boneheaded political move by Barack Obama to turn a Safe D race in 2014 into a Lean R race in 2013 even if Kerry is extremely qualified.
1:29 PM PT: As someone pointed out in the David Nir's diary on the two polls, MassInc had Brown up by 4 in October so this could be slanted towards Brown(Warren as we know wound up winning by 8)
And there is a WashPo story that mentions that Meehan won't run.