http://www.washingtonpost.com/blogs/the-switch/wp/2017/09/22/facebook-google-and-twitter-could-face-a-new-law-targeting-shadowy-political-ads/

Democratic lawmakers are pushing for new legislation that would require greater disclosure of political ads that run on Internet platforms, despite a pledge by Facebook chief executive Mark Zuckerberg that the company will voluntarily pull back the curtain on political advertising on the social network.

Sens. Amy Klobuchar (Minn.) and Mark R. Warner (Va.) urged colleagues Thursday to support a bill that would create new transparency requirements for platforms that run political ads online akin to those already in place for TV stations, according to a letter obtained by The Washington Post.