https://www.cnbc.com/2018/06/04/doj-antitrust-chief-isnt-ruling-out-t-mobilesprint-merger.html > An official who could have a big say in whether Sprint Corp. and T-Mobile US Inc. can merge is keeping an open mind. > Makan Delrahim, who heads antitrust efforts for the U.S. Department of Justice, said he doesn't see reducing the number of major wireless carriers from four to three as inherently bad for the market, Bloomberg reports.