Politico:

The Federal Election Commission signaled Friday that it will take steps to uncover some types of virtually untraceable donations to super PACs, a potentially significant shift in the enforcement of campaign finance law.

The move came as the FEC released documents resolving a complaint about a pair of 2018 donations to DefendArizona, a super PAC that supported then-Rep. Martha McSally’s (R-Ariz.) Senate bid.

The complaint, originally filed by the nonprofit watchdog group Campaign Legal Center, alleged that a pair of donations to the super PAC were not properly disclosed. The money came in from two limited liability companies, but there was no indication of who was actually behind the money before it went into the LLC.

Straw donations to super PACs run through anonymous LLCs have become increasingly common in recent years, as some wealthy political donors look to shield their contributions from the public by routing them through other entities first. The FEC has been frozen for years on what to do about these donations, effectively blessing them by not policing requirements that would have forced further disclosure.

That all apparently changed Friday. A statement from four of the six commissioners indicated that the agency would now start cracking down on these straw donations, requiring that the LLCs disclose who is actually behind the companies. There are still other avenues for untraceable money to flow into super PACs, but the LLC route has been a major one.