Lawyers from Facebook, Google, and Twitter will be questioned on Capitol Hill Wednesday. The hearing follows the news that Russia's presence on these platforms during last year's election may have been hugely underestimated. Axios' Media Reporter Sara Fischer says even though the tech giants have gotten away with self-policing until now, people are losing trust in their ability to do so. While these companies don't face immediate regulatory threats from the government, Fischer says Wednesday's hearing will dictate public opinion for years to come. According to prepared remarks obtained by the New York Times, Russian agents disseminated information that reached 126 million users on Facebook, published more than 131,000 messages on Twitter, and uploaded over 1,000 videos to Google's YouTube service.