FILE - In this April 14, 2020 file photo, the thumbs up Like logo is shown on a sign at Facebook headquarters in Menlo Park, Calif. As President Donald Trump denies that Russia is interfering in the U.S. election and as he tries to block information to Congress, private companies such as Microsoft and Facebook are stepping into the breach. The private sector has become much more forthcoming about election interference since 2016, providing frequent briefings to key members of Congress. (AP Photo