Counterpunch has the April 1, 2016 article How Hillary Clinton Bought the Loyalty of 33 State Democratic Parties.
Collusion between the Clinton campaign and the DNC allowed Hillary Clinton to buy the loyalty of 33 state Democratic parties last summer. Montana was one of those states. It sold itself for $64,100.
Democratic State Cmte of Massachusetts D P $64,100
So, if you have any doubts as to whether Massachusetts was a party to any of this, I think here is your answer. I think all Massachusetts Democratic politicians owe us an answer about what they knew about this, and when they knew about it.
Should I have a reasonable suspicion that Elizabeth Warren’s refusal to endorse her political soulmate had anything to do with a backroom deal?
One could reasonably infer that the tacit agreement between the signatories was that the state parties and the Hillary Clinton Campaign would act in unity and mutual support. And that the Super Delegates of these various partner states would either pledge loyalty to Clinton, or, at the least, not endorse Senator Sanders.