The US Department of Justice (DoJ) has received a petition from four congresspeople, asking for a reexamination of the $43 billion sale of AT&T’s WarnerMedia to Discovery. The politicians allege that it has enabled the new entity to “adopt potentially anticompetitive practices,” which include worse programming options for consumers and staff layoffs. Warner Bros Discovery’s CEO, David Zaslav, is not particularly well-liked in the industry, and given the cozy nature of big business and the US government, we suspect not many would rush to Zaslav’s defense publicly. The new giant is something of a posterchild for the hot-button issue of big business run amok in the US economy, and so the firm is a sensible target. Unfortunately, the current attack…