Senate Finance Committee Chairman Ron Wyden (D-OR) has requested documents from Harlan Crow, a Texas billionaire who has donated millions to conservative causes, to investigate whether his gifts to Supreme Court Justice Clarence Thomas violated federal tax law. Chief Justice John Roberts has responded to a request from Senator Dick Durbin (D-IL) for Roberts to testify about Thomas’s relationship with Crow by providing a statement of ethics principles and practices to which all current Supreme Court members subscribe. Wyden's letter to Crow requests documents and communications related to the gifts, as well as any records of payments made to Thomas or his wife, to investigate whether the gifts violated federal tax law.