The congressman says so far his Republican colleagues have been reluctant to criticize Facebook after the Cambridge Analytica scandal. But bringing CEO Mark Zuckerberg to testify will "send a signal to the GOP that it's OK to express their concerns." In light of Facebook's role in the 2016 Presidential elections, Rep. Cicilline (D-RI) introduced legislation to protect reliable news sources and, in turn, protect the integrity of U.S. elections.