The U.S. Supreme Court on Tuesday will hear oral arguments in a landmark case over whether federal law enforcement can force Microsoft to hand over email stored in an overseas data center as evidence in a drug-trafficking case. The case, United States of America v. Microsoft Corporation, which dates back to 2013, is viewed as a potentially groundbreaking showdown over data privacy in an era when increasing amounts of information are stored in the cloud and reside in third-party jurisdictions. At the heart of this case is a data center in Dublin.