In a San Francisco courtroom, federal regulators are fighting to block one of the biggest deals in the history of Silicon Valley. David McCabe, who covers technology policy for The New York Times, talks about Lina Khan, the F.T.C. chair who is the architect of the lawsuit, and the growing campaign to finally rein in big tech.Guest: David McCabe, a New York Times correspondent covering technology policy.Background reading: The Federal Trade Commission sued Microsoft to stop the company from closing its purchase of the video game powerhouse Activision Blizzard, escalating government efforts to stymie the largest consumer technology deal in decades.Satya Nadella, the chief executive of Microsoft, appeared in federal court on Wednesday to defend the deal by pledging support for open platforms and consumer choice.For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.