Last Wednesday, the Ninth Circuit issued a 2-to-1 decision in Rittman v. Amazon, holding that Amazon "last-mile" delivery drivers are transportation workers engaged in interstate commerce under 9 U.S.C. § 1 and, therefore, are exempt from the Federal Arbitration Act's enforcement provisions. As law prof Adam Steinman explains here, Rittman follows a recent decision from the First Circuit, Waithaka v. Amazon.