( September 25, 2024, 1:56 PM EDT) -- NEW YORK — The U.S. Department of Justice (DOJ) on Sept. 24 sued Visa Inc., a company operating “the largest debit network in the United States,” alleging violations of the Sherman Act regarding Visa’s purported monopoly power “in the general purpose debit network services” and online “general purpose card-not-present debit network services markets in the United States with market shares of at least 60% and 65%, respectively, by payment volume.”...