Bloomberg BNA:

The revelation that Russian sources financed political ads on Facebook in the 2016 presidential campaign could prompt enforcement action by the Federal Election Commission, agency Vice Chairwoman Caroline Hunter said.

“It’s something we can and should deal with in the enforcement process,” Hunter said Sept. 7, noting that federal campaign finance rules bar the use of foreign campaign money to influence U.S. elections. She said she couldn’t comment further on details of the Facebook matter because anything that might come before the FEC as an enforcement case is covered by strict confidentiality rules.

The details of the Facebook matter could be crucial, however, Hunter suggested. She said FEC rules exempt “pure issue speech” from coverage under campaign finance law.