On March 7, the U.S. Department of Justice (DOJ), along with the attorneys general of Massachusetts, New York, and the District of Columbia (together the Government Enforcers), sued to block JetBlue Airways Corp.'s (JetBlue) planned $3.8 billion acquisition of Spirit Airlines, Inc. (Spirit). The Government Enforcers have alleged that JetBlue and Spirit fiercely compete head-to-head on dozens of routes and a merger would eliminate Spirit—an alleged maverick that has purportedly defied industry coordination to become the fastest-growing "ultra-low-cost carrier" in the United States—thus substantially lessening competition in violation of Section 7 of the Clayton Act. See Complaint at 1-3, United States v. JetBlue Airways Corp. and Spirit Airlines, Inc., No. 1-23-cv-10511 (D. Mass. Mar. 7, 2023), ECF No. 1. Claiming that JetBlue plans to remove seats from planes, the Government Enforcers assert that the deal will result in anticompetitive effects that include the elimination of head-to-head competition between JetBlue and Spirit, an increase in ticket prices, the reduction in passenger capacity and consumer choice, and the facilitation of greater airline competitor coordination.