The United States Department of Justice has asked the Federal Communications Commission to defer the planned merger between Sprint (S) and Japanese carrier Softbank (SFTBY), according to Bloomberg. A deferment will give the department more time to review the proposal for “any national security, law enforcement, and public safety issues” that have not yet been evaluated. Sprint agreed to merge with Softbank last October in a deal worth more than $20 billion. Both companies had hoped to have the merger approved by mid-2013.