Department of Justice Assistant Attorney General Gail Slater recently gave a speech repudiating the laissez-faire antitrust enforcement policy of past administrations. Meanwhile, President Donald Trump has ordered antitrust agencies to investigate how price-fixing has raised food prices. If the administration is serious about bringing food prices down for Americans, it should begin by addressing the costs farmers face. For that reason, Slater should investigate and possibly challenge the mergers between large seed sellers that occurred during Trump’s first term in office, writes Peter Carstensen.