Jacob Gershman for the WSJ Law Blog:

Claims that Democratic Party leaders conspired to squash the presidential primary campaign of Sen. Bernie Sanders have not only led to a party shake-up but have sparked class-action litigation.

A trove of hacked party emails posted by WikiLeaks show that Democratic National Committee officials had worked to undermine the underdog campaign of Mr. Sanders.

Weeks before the firestorm erupted, culminating in the resignation of party chief Debbie Wasserman Schultz, a group of plaintiffs brought a lawsuit in federal court alleging that DNC “actively concealed its bias” from its donors and Democrats backing Mr. Sanders.

The plaintiffs, about 150 of whom are identified in the lawsuit, are mostly Sanders supporters and include a number of DNC donors.