https://www.recode.net/2017/9/17/16322606/house-intel-schiff-facebook-testify-congress-russian-interference

Rep. Adam Schiff, the top Democrat on the House Intelligence Committee, stepped up political criticism of Facebook and other social media outlets and called for testimony about Russian interference in the 2016 presidential election using their platforms.

Earlier this week, Recode reported that a Senate committee that’s investigating was already discussing whether to invite representatives from Facebook and Twitter to testify about misinformation spread on their websites.