Joining the 1st Circuit, this decision holds that a worker can be “engaged in interstate commerce” and thus exempt from the FAA even though the worker, himself, does not cross state lines–so long as he is part of a distribution chain that extends across state lines.  Thus, Amazon’s “last-mile” delivery drivers were exempt from the FAA.  Though they didn’t cross state lines, the goods they delivered for Amazon had done so as part of Amazon’s multi-state and international distribution system.  Also, since the employment agreement and its arbitration clause chose federal law, not state law, to govern the arbitration agreement, and since there was no other applicable federal law other than the FAA, which by its own terms didn’t apply, no law applied and the arbitration clause was therefore unenforceable.