FILE- In this Nov. 1, 2017, file photo, Facebook ads linked to a Russian effort to disrupt the American political process are displayed as Google's Senior Vice President and General Counsel Kent Walker, Facebook's General Counsel Colin Stretch, and Twitter's Acting General Counsel Sean Edgett, testify during a House Intelligence Committee hearing on Capitol Hill in Washington. Facebook says it will require political advertisers in the U.S. to label “issue ads” that disclose who paid for them, part of its ongoing efforts to prevent elections-related misuse of its platform. Such ads played prominently in Russia’s efforts to interfere in the 2016 U.S. elections. (AP Photo/Manuel Balce Ceneta, File)