His staff won't answer the phone readily unless you are a donor per a friend of mine whose mother was very influential in MA politics
I have gotten through many times calling on the number that is furnished by Unions that we use here sometimes. Maybe that is the trick, use the Union Numbers. I remember one time after a typical hangover induced unintelligible rant from Kennedy on The Networks, I called up his office and said "Good God ,can you please take the Mike away from Kennedy"? They laughed,and laughed about that and even made jokes about him themselves, I was shocked to say the least. It proves one huge point that they do not worry about that toad getting re-elected until he croaks, and they think he is a joke also.