UCR Library subscribes to a variety of newspaper platforms. You can search them all using UC Library newspaper search.
Newspaper databases can also be searched seperately. Here is a selection that may be useful for your essay:
Formerly Gale NewsVault, Gale Primary Sources - Newspapers the interface to search across all of Gale's newspaper collections.
A digitized collection of selected California newspapers from 1849 to contemporary times.
Full-text newspapers from over 600 U.S. and 700 international sources; date coverage varies with individual newspaper.
News articles from 1977-present, including print and online-only newspapers, blogs, newswires, journals, and videos.
Formerly Lexis Nexis; provides full-text access to more than 5,900 news, business, legal, medical, and reference publications.
Cross-searchable database of prominent U.S. newspapers including the Los Angeles Times, New York Times, and more; includes current and historical content. For a list of publications