In the library catalog Onesearch , search for books by title, author, subject or keywords. The following are some suggested Library of Congress Subject Headings (LCSH):
Elections United States
Elections California
Voting -- California
United States. Congress voting
Presidents Election
Suggested reference for data / statistics
America Votes (v.1-v. 31) (located on the 2nd floor reference section, Call number JK1967 .A8)
Online access:
American Votes 30
America Votes 31 (2013-2-14)
America Votes 32 (2015-2016)
America Votes 33 (2017-2018)
Statistical Abstract of the United States (ProQuest)
Statista