An organizing campaign in Massachusetts is seen by many as the first step in the Teamsters' effort to unionize FedEx drivers. The Teamsters' goal is to organize the nearly 15,000 drivers in the FedEx Ground division. FedEx says that the union push is an anomaly and that the majority of the drivers are happy and oppose unionization.
See "Teamsters Hope to Lure FedEx Drivers", Steven Greenhouse, The New York Times, May 29, 2006