The Claremont Institute is a conservative think tank based in Upland, California. The institute was founded in 1979 by four students of Harry V. Jaffa. It produces the Claremont Review of Books, The American Mind, and other publications. The institute was an early defender of Donald Trump. After Joe Biden won the 2020 election and Trump refused to concede while making claims of fraud, Claremont Institute senior fellow John Eastman aided Trump in his failed attempts to overturn the election results.