On April 18, some New York voters who have been told that their registration records are either lost, or else show the wrong political party affiliation, filed a federal lawsuit. See this story. The case is Campanello v New York State Board of Elections, eastern district, 2:16cv-1892. According to the story, the case has a hearing at 9 a.m. Tuesday, April 19, which is the date of the New York presidential primary.