California Supreme Court Says Arbitrator Decides Whether Parties Agreed To Arbitrate Class Action Claims In a highly anticipated decision, the California Supreme Court ruled that the question of whether parties to an arbitration agreement agreed to arbitrate class action claims is a question to be decided by the parties’ arbitrator and not by a court. Sandquist v. Lebo Automotive, Inc., ____ Cal.4th ____, 2016 Daily Journal Daily Appellate Report 7663 (California Supreme Court July 28, 2016)...