The antitrust trial between the FTC and Kroger began with opening arguments on Monday and could shape the future of America's grocery sector. The FTC seeks to block Kroger's $25 billion acquisition of Albertsons, a merger that would create the second-largest grocery chain in the U.S. after Walmart. The trial may hinge on which retailers are considered Kroger's key competitors. The defense warned that blocking the deal could lead to layoffs, store closures, or even the sale of Albertsons to another company. This case could be one of the last major antitrust decisions under the Biden-Harris administration before the next election.