Pressure's on Mass. superdelegates - The Boston Globe:
"Unlike the 93 Massachusetts delegates whose votes at the convention must reflect the results of the Feb. 5 primary, which Clinton won, the superdelegates are free to pick either candidate. According to Democratic Party rules, superdelegates are under no obligation to follow the will of the voters, as history has shown.
In 1984, Massachusetts superdelegates lined up behind eventual nominee Walter F. Mondale, helping him carry the state at the Democratic National Convention, even though Gary Hart had won the state's primary."