Herbert Hoover was president at the time The Church of Light was formed in Los Angeles on November 2, 1932, but was voted out of office the same week on November 8. Like Elbert Benjamine, he spent his childhood in Iowa but explored the Pacific Northwest in his teens with maternal relatives in Oregon.
His natal chart does not appear in the Lessons, but two adjacent paragraphs describe his activities in Volume 13, Mundane Astrology, among several appearances of his name in the book. His birthday was the occasion of a speech heard by thousands in person and millions on the radio in August 1928, and in February and March 1929 Elbert noted two political successes:
The best information source online about Hoover is the website of his Presidential Library and Museum.
President Herbert Hoover | The Herbert Hoover Presidential Library and Museum (archives.gov)
Here is a natal chart from Astrodatabank