Sprint and T-Mobile have been doing the merger dance for a few months now, but as Ben Munson of Wireless Week reports, it’s likely to be an uphill climb:

U.S. Justice Department officials told Sprint CEO Dan Hesse and SoftBank CEO Masayoshi Son that any potential Sprint/T-Mobile merger would be met with “skepticism.”

The Wall Street Journal spoke with individuals briefed on the conversation who said the meeting reinforced Son’s seriousness in making the merger happen.