The lawmakers said the chief justice was duty-bound to conduct a “swift, thorough, independent and transparent investigation” of Thomas’ undisclosed travel with billionaire Harlan Crow in order to “safeguard public faith in the judiciary.”

A White House spokesperson told TPM that they’ll instead depend on the appellate process, and are 'prepared for a long legal fight'

With $80 billion in new funding, the previously gutted agency pledged to renew its pursuit of wealthy tax dodgers and address a number of problems that ProPublica has been reporting on in recent years.

In response to a ProPublica report, Thomas explained why he did not disclose lavish travel provided by billionaire Harlan Crow. But legal experts maintain the justice was required to make these disclosures.