Issuing a writ of mandamus, an appellate court directed the district court to vacate its order granting a party’s motion to disqualify an arbitrator while the arbitration was ongoing. In re Mary Ann Sussex, 776 F.3d 1092 (9th Cir. 2015). The Ninth Circuit found that the district court clearly erred in predicting that an arbitration award would likely be vacated because of the arbitrator’s alleged partiality. The court of appeals concluded that even if the arbitrator had created a reasonable impression of partiality, the district court’s concern that delays and expenses would result if an arbitration were eventually vacated is inadequate to justify a mid-arbitration intervention, regardless of the size and early stage of the arbitration.