He also has argued two cases before the Supreme Court of the United States and currently has been appointed by the Supreme Court of the United States to serve as a special master in an interstate water-rights dispute, "Kansas v. Nebraska and Colorado".
He also has argued two cases before the Supreme Court of the United States. In April 2011 the Supreme Court of the United States appointed him to serve as special master in an interstate water-rights dispute, "Kansas v. Nebraska and Colorado".