http://www.washingtonpost.com/blogs/the-switch/wp/2018/03/22/a-key-congressional-committee-has-asked-facebook-ceo-mark-zuckerberg-to-testify-on-cambridge-analytica/ >Congressional lawmakers have formally requested that Facebook chief executive Mark Zuckerberg testify at an upcoming hearing in response to reports that a data analytics firm used by the Trump campaign had improperly accessed the names, "likes" and other personal information of about 50 million users on the social site. >The request officially came Thursday from the House Energy and Commerce Committee, a powerful panel that oversees Facebook and its tech peers, and arrives a day after Zuckerberg said he would be "happy" to appear on Capitol Hill to address lawmakers' lingering questions about Facebook's privacy protections.