A U.S. District Court in Los Angeles has set various deadlines for Soltysik v Padilla, c.d. 2:15cv-7916. This is the case over California’s election law that lets some, but not all, candidates for Congress and partisan state office have party labels on the ballot. The plaintiff, a registered Socialist, was not permitted to have a label because the Socialist Party is not ballot-qualified in California.
Each side has a deadline in late summer 2020 for various filings, so the case can’t be decided in time for the 2020 primary, which is in March 2020.