The financial secrets of dozens of politicians, criminals and celebrities were revealed in a new wave of documents from the Panama Papers.
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At a hearing of the Senate Banking Committee’s national security subcommittee Wednesday, a former senior Treasury Department adviser warned there are so many anonymous shell companies in the U.S. and abroad that it’s hard to even offer meaningful statistics about the threat they pose.

“What we are looking at may not even be statistically relevant,” said Chip Poncy, the first director of the Office of Strategic Policy for Terrorist Financing and Financial Crimes, from 2006 to 2013.

Oregon Sen. Ron Wyden, the top Democrat on the Senate Finance Committee, is pushing a bill to require the Treasury Department to create a standard, bare-bones “ownership disclosure” that could be filed with either state or federal authorities when anonymous companies are formed. It would require disclosure of true owners from the outset, instead of nominees and managers who appear on documents but aren't the owners.

If a state chose not to adopt this new standard, companies would have to register with the Financial Crimes Enforcement Network, or FINCEN, Treasury’s watchdog on illicit finance.

“This isn’t too complicated. We want to know who the true owners are at the get-go,” Wyden said in an interview.

The legislation is also sponsored by Florida Republican Sen. Marco Rubio, who said he was stumped about why no U.S. charges have been filed in the aftermath of the Panama Papers.

“That would be a Department of Justice function and I don't know where they are in the investigations or where they would be in terms of being able to bring evidence,” Rubio said. “They would have to be able to get a conviction so, that's an interesting question.”

Wyden puts the blame on the Trump administration for not addressing the problem of shell companies.

“There is a difference between taking the time needed to be responsible, and letting this stall out,” said Wyden. “The pace they are going at is going to make this the longest running battle since the Trojan War.”

Kevin G. Hall: 202-383-6038; @kevinghall

Nicholas Nehamas of the Miami Herald contributed to this story, as did Ben Wieder and Alex Daugherty in the McClatchy Washington Bureau.