As Stephen Colbert would say, "THE FIGHTING ALL OF MASSACHUSETTS!"
MA-1: Incumbents: Richard Neal (D-Springfield), John Olver (D-Amherst), and Jim McGovern(ment) (D-Worcester). This district is comprised nearly 100% of towns that voted for both Martha Coakley and Deval Patrick. Safe D. The most interesting thing would be seeing the primary unfold in this seat, as each of the three parts of the district would be represented: liberals in college towns (Olver), labor style Dems in Springfield (Neal), and their friends in Worcester (McGovernment). Safe D.
MA-2: Vacant. This new, northeastern Massachusetts based competitive seat would be a perfect fit for the moderate ex-St. Sen Richard Tisei (R-Wakefield), who was Charlie Baker's running mate in 2010. Tisei would be the first openly Gay (before being elected) Republican elected to serve in Congress. How would this exburban district vote? Toss Up? Lean R with Tisei?
MA-3: Vacant. I'm not sure how this central/southern Massachuestts based seat would vote, but considering that most of the towns it contained voted for Brown/Baker, I'm guessing it could elect a Republican. The town of Weston is rewarded here for being the only MetroWest Suburban Boston town to vote for both Scott Brown and Charlie Baker by being taken out of the iron grip of US Rep Ed Markey. Toss Up? Lean R? Lean D?
MA-4: Vacant. This suburban Worcester/suburban Springfield/rural central Massachusetts district would likely have voted for McCain, or at least would probalby have a low R+ PVI. Nearly all of the towns in the district voted for Brown/Baker, and the only area that seems to be somewhat Democratic is the town of Fitchburg. R+1 or R+2? Leans (or Likely?!) R?
Karyn Polito (R-Shrewsbury) would run here, and would probably have a fairly easy time getting into the US House.
MA-5: Incumbents: Nikki Tsongas (D-Lowell), Ed Markey (D-Malden), and John Tierney (D-Salem). This ex-industrial/suburban Boston/North Shore vote sink contains much of Tsongas and Tierney's bases, and both of their homes. It would be a comptetive and intersting primary in this Democratic seat. Ed Markey lives here (not really, as he spends little to no time in MA), but he would run in the MetroWest based MA-6 that holds much of his current territory. Safe D.
MA-6: Vacant (Ed Marky would run here).
This extremely liberal MetroWest suburban Boston district will be safe D for as long as I can tell.
MA-7: Incumbents: Mike Capuano (D-Somerville) and Stephen Lynch (D-Southie). This Boston/Cambridge based seat is extremely liberal and won't be going our way any time soon. Vote sink! This will be a fun primary to watch!
MA-8: Incumbents: Bawney Fwank (D-Newton) and Bill Keating (D-Quincy). Fight! Keating would get crushed by Barney Frank here. This super Democratic vote sink is the lynchpin of this map. It contains the Democratic cities of Newton, Quincy, Fall River (Riv-AH), Taunton, Brockton, New Bedford (Bed-FIHD), and the liberal islands of Martha's (Mathah's Vineyahd) and Nantucket. Safe D.
MA-9: This Cape Cod/Barnstable County based district is comprised of nearly all Brown/Baker towns. It picks up some Republican leaning areas from the old MA-9 and MA-3, and dumps the Islands and Quincy. However, it retains Plymouth (which voted for Baker and Brown), as well as the end of Cape Cod, including the heavily liberal and heavily LGBT Provincetown. This district likely has an EVEN or D+1 or maybe D+2 PVi. Toss Up? Lean R with the right candidate? I have a feeling that this district is just itching to elect a Republican to Congress.