Question: Which President that served as a Senator from California,  did Beatrice Willard serve as an advisor?

Related documents: [0]  [DOC] Richard Milhous Nixon (January 9, 1913 – April 22, 1994) was the 37th President of the United States from 1969 until 1974, when he resigned from office, the only U.S. president to do so. He had previously served as the 36th Vice President of the United States from 1953 to 1961, and prior to that as a U.S. Representative and also Senator from California. [END] 
[1]  [DOC] Beatrice Willard (December 19, 1925 – 7 January 2003) was an American botanist who specialized in studies on the ecology and botany of high alpine tundra, as well as arctic tundra. Willard's studies influenced public policy with her studies, which centered on plant life at high altitudes. Willard was responsible for the establishment of the Beatrice Willard Alpine Tundra Research Plots above the treeline in Rocky Mountain National Park, now listed on the National Register of Historic Places. In later years she was an adviser to U.S. presidents Nixon and Ford as the first woman on the Council on Environmental Quality (CEQ). [END]  
Answer: Richard Milhous Nixon
Richard Milhous Nixon