Joshua Kaplan, Justin Elliott and Alex Mierjeski | ProPublica

In attending the Koch donor summits, Thomas has helped a political network that has brought multiple cases before the Supreme Court.

The new filing comes after ProPublica’s reporting on the Supreme Court justice’s beneficial relationship with the billionaire GOP megadonor.

In 2008, Supreme Court Justice Clarence Thomas sent his grandnephew to private school. GOP megadonor Harlan Crow’s company paid for it.

The 2014 transaction is the first known instance of money flowing from the GOP megadonor to the Supreme Court justice.

Democrats on the Senate Judiciary Committee have announced plans to hold a hearing in the coming days “regarding the need to restore confidence in the Supreme Court’s ethical standards.”

The Supreme Court justice’s brief statement acknowledges joining a GOP megadonor and his wife on “a number of family trips” over the years.

For more than two decades, Thomas has accepted luxury trips virtually every year from the Dallas businessman without disclosing them, documents and interviews show.