I gotta disagree. There are such creatures as conservative Democrats in Massachusetts. Senator Birmingham was probably about as conservative as most of the RINOs that Bush loves. But Boston Democrats are liberal through and through. And the only conservatives I ever met were black or Goth. No kidding.
By comparison, Somerville is downright working class.
How would you describe the pro-life Democrats in Southie and West Roxbury? I think they have a lot in common with many southern conservatives, but their type is largely absent from the other cities I mentioned.
The white working class in Somerville is melting away like snowmen in April. They've all cashed in their real estate and moved to the suburbs. It's gentrifying like you wouldn't believe. (I'm part of it.)