https://www.reuters.com/article/us-facebook-cambridge-analytica-feinstei/senate-democrat-wants-facebook-ceo-zuckerberg-to-testify-idUSKBN1GW2TU >U.S. Senator Dianne Feinstein, the top Democrat on the Judiciary Committee, said on Tuesday that Facebook Inc chief executive Mark Zuckerberg should testify in Congress about his company's treatment of users' data.