Facebook has already handed over the ads to the special counsel investigating Russian interference in the 2016 U.S. presidential election. At the moment, there's no way for anyone but Facebook to track these political ads, or for recipients to tell who is sponsoring such messages. The top Democrat on the Senate intelligence panel would go farther. The leaders of the Senate Intelligence Committee have sought to bring Facebook executives before their committee for the past couple of weeks. But critics say Facebook should go further.

Source: ABC News September 21, 2017 19:50 UTC