The plan, set for discussion at Thursday's FEC meeting, could open the door to political subpoenas targeting the websites, their editorial news decisions, and their owners, maybe even Matt Drudge and Alex Jones, according to an expert analysis.

In her effort targeting foreign influence in federal and state elections, Commissioner Ellen Weintraub would probe spending by overseas sources and even partially-foreign-owned U.S. firms on campaigns, including their media buys. Foreign influence is illegal in elections.

She said that tackling foreign influence in elections could be the FEC's finest hour, adding, "I believe that this Commission can indeed rise to the challenge of understanding what happened in the 2016 election and plugging any legal or procedural holes that could allow foreign actors to interfere with our future elections."