 Since all of the judges are appointed by the same person (the Chief Justice of the United States), hear no opposing testimony and feel no pressure from colleagues or the public to moderate their rulings, Sanchez claims that "group polarization is almost a certainty", adding that "there's the real possibility that these judges become more extreme over time, even when they had only a mild bias to begin with".The court's judges are appointed solely by the Chief Justice of the United States without confirmation or oversight by the U.S. Congress.This gives the chief justice the ability to appoint like-minded judges and create a court without diversity.