William Patrick Clark , Jr. ( October 23 , 1931August 10 , 2013 ) , was an American rancher , judge , and public servant who served under President Ronald Reagan as the Deputy Secretary of State from 1981 to 1982 , United States National Security Advisor from 1982 to 1983 , and the Secretary of the Interior from 1983 to 1985 .
William Patrick Clark , Jr. ( October 23 , 1931 -- August 10 , 2013 ) was an American rancher , judge , and public servant . He served under President Ronald Reagan as the Deputy Secretary of State from 1981 to 1982 , National Security Advisor from 1982 to 1983 , and the Secretary of the Interior from 1983 until 1985 .