They say that about Maryland (regarding the Baltimore PG Axis of Evil) ... and yet I not that the current congressional delegation from the Peoples Republic of Massachusetts is 100% democrat.
Same as Maryland ...
A lot of that is gerrymandering. Look at the blue/red county map. MA is about 60-40 lib to conservative. Small number of registered Republicans, but huge number of registered "unenrolleds," about 40%.
Also, the communities with concentrated moonbat populations are very outspoken and headline-grabby.