Every judge appointed to such a court may be categorized as a federal judge; such positions include the Chief Justice and Associate Justices of the Supreme Court, Circuit Judges of the courts of appeals, and district judges of the United States district courts. All of these judges described thus far are referred to sometimes as "Article III judges" because they exercise the judicial power vested in the judicial branch of the federal government by Article III of the U. S. Constitution. In addition, judges of the Court of International Trade exercise judicial power pursuant to Article III.