https://www.cnbc.com/2017/09/21/google-twitter-reddit-and-others-could-be-drawn-into-an-investigation-by-the-u-s-congress-into-russia-and-the-2016-election.html

A congressional investigation into Russia's role in the 2016 presidential election — and the way in which Kremlin-aligned forces may have pursued their efforts on social media — is already expanding beyond early scrutiny of Facebook.

For Sen. Mark Warner, the top Democrat on his chamber's intelligence committee, there are fresh fears about the extent to which Russian agents may have tapped bots to amplify their message on other websites like Twitter, he told Recode on Wednesday. To that end, Twitter is set to brief staff of the Senate Intelligence Committee, which is leading the probe, next week.