According to this story, the lawsuit filed in 2014 by the Utah Republican Party and the Utah Constitution Party will not be settled by mediation. The case is Utah Republican Party v Governor Gary Herbert, 2:14cv-876. The issues are the law that (1) requires parties to put candidates on their primary ballots even if those candidates have no support at party caucuses; require parties to let independent voters vote in their primaries. The law says parties are free to ignore both requirements, but if they do, they won’t be considered ballot-qualified and will need to put their nominees on the November ballot via independent candidate petition procedures.