Photos: Social media offers dark spaces for political campaigning

ADVANCE FOR RELEASE SUNDAY, MARCH 11, 2018 AND THEREAFTER - FILE - In this Nov. 1, 2017, file photo, from left, Facebook General Counsel Colin Stretch, Twitter Acting General Counsel Sean Edgett and Google Senior Vice President and General Counsel Kent Walker are sworn in for a Senate Intelligence Committee hearing on Russian election activity and technology, on Capitol Hill in Washington. Much of what happens in political campaigns today takes place in the often murky world of social media, where the sources of ads do not have to be disclosed and hoaxes spread quickly. The 2016 presidential race featured Russian interference that included covert ads on social media and phony Facebook groups pumping out falsehoods. (AP Photo/Jacquelyn Martin, File)[/caption]

ADVANCE FOR RELEASE SUNDAY, MARCH 11, 2018 AND THEREAFTER - FILE - In this Tuesday, Dec. 12, 2017, file photo, journalists follow U.S. Senate candidate Roy Moore as he arrives to cast his vote in Gallant, Ala. December’s U.S. Senate election in Alabama was rife with fake online reports in support of Moore, who lost the race to Democrat Doug Jones amid allegations that Moore had sexual and romantic contact with teens when he was a prosecutor in his 30s. (AP Photo/Brynn Anderson, File)[/caption]

FILE - This Oct. 26, 2016 file photo shows a Twitter sign outside of the company's headquarters in San Francisco. A new study published Thursday, March 8, 2018, in the journal Science shows that false information on the social media network travels six times faster than the truth and reaches far more people. (AP Photo/Jeff Chiu), File[/caption]