On March 5, seven New Jersey voters filed a lawsuit in federal court, arguing that the New Jersey Constitution is violated when taxpayers pay for partisan primaries. Four of the voters are independents, one is a Democrat, and two are Republicans. The case is Balsam v Guadagno, 2:14cv-01388. It was assigned to U.S. District Court Judge Stanley Chesler, a Bush Jr. appointee. Here is the Complaint.
New Jersey lets independents vote in partisan primaries, but on primary day, if they ask for a major party primary ballot, they are then listed as major party members, and they must fill out a new voter registration form to regain their independent status. The plaintiffs who are registered Republican and Democrats say they only registered into the major parties so as to be able to vote in primaries, but they would rather not be members of those parties.