Speaking at the CTIA Wireless trade show, Sprint CEO Dan Hesse said that the company plans to file its concerns about the proposed AT&T / T-Mobile merger with the U.S. government. It believes the merger will "stifle competition" and AT&T will have "tremendous power." If allowed to go through, AT&T and Verizon Wireless would control 79% of the entire U.S. market. On Monday, the U.S. House Judiciary Committee (which oversees anti-trust concerns) announced plans to hold a hearing on the merger. The merger needs regulatory approval to proceed. A combined AT&T / T-Mobile entity would have approximately 130 million customers, more than double Sprint's approximate 60 million customers.