The Antitrust Division of the Department of Justice is charged with the responsibility of challenging mergers which have a reasonable probability of substantially lessening competition or tending to create a monopoly. The thesis of this Article is that the Antitrust Division has changed from a traditional, litigation-oriented enforcement agency to a regulatory agency. The Antitrust Division, as an economic regulator, has adopted a negotiational rather than an adversarial posture. The result is an avoidance of lengthy and costly adversarial litigation in exchange for a more efficient resolution of merger issues. Section I of this Article reviews the original intention of the drafters of the Sherman and Clayton Acts. Section II identifies cla...