LOS ANGELES - William P. Clark, who rose from campaign volunteer to one of President Ronald Reagan's most trusted advisers, has died. He was 81.
Clark's son, Paul, said his father died Saturday at his ranch home in Central California after a long battle with Parkinson's Disease.
The elder Clark began working for Reagan by managing the actor's 1966 gubernatorial campaign in Ventura County, Calif., then ascended to various political jobs as Reagan moved from the Golden State to the White House.
He worked for Reagan in Sacramento, was appointed by him to serve on several California courts before moving to Washington to serve as deputy secretary of state and national security adviser. He also served as Interior secretary before returning to his private law practice and business consulting firm.
Clark is survived by five children.