https://www.reuters.com/article/us-tech-antitrust-hearing/top-u-s-antitrust-regulators-admit-to-infighting-on-big-tech-probe-idUSKBN1W225Q >The top U.S. antitrust regulators admitted on Tuesday they had wasted time arguing over who would investigate which tech company as they take on major probes of firms like Alphabet's Google for using their market power unfairly.