On May 20, some California activists who are informally working for Bernie Sanders filed a lawsuit against some California county election officials, and the Secretary of State. They are concerned that many votes, both independents and party members, have not been adequately informed about the rules for the June presidential primary. One of the plaintiffs is the American Independent Party. Having a qualified political party in the lawsuit may help to overcome standing problems. The case is Voting Rights Defense Project v DePuis, 3:16cv-2739, northern district.
The lawsuit complains that many independent voters have already sent in the mail ballots they received automatically, and these ballots do not include the presidential primary. If such independent voters then learn that they could have requested a Democratic, American Independent, or Libertarian presidential primary ballot, it is too late for them, because no one is permitted to vote twice.
The lawsuit also complains that some of the counties have given information only to independent voters, when they should have given the information to all voters. And the lawsuit complains about the fact that instructions and procedures differ from county to county. Here is a Sacramento Bee story about the lawsuit. Here is the original Complaint, which has since been amended because the original cover sheet referred to the “American Independence Party” instead of the American Independent Party. UPDATE: here is a somewhat more detailed story, from a newspaper in San Diego County.