https://www.reuters.com/article/us-tech-antitrust-delrahim/u-s-doj-antitrust-chief-says-working-with-states-on-big-tech-probe-idUSKCN1VA1OR >The U.S. Justice Department is working with a group of more than a dozen state attorneys general as it investigates the market power of major technology companies, the department's antitrust chief, Makan Delrahim, said on Tuesday.