President Warren G. Harding died in office in 1923 (heart failure). Corruption was already unraveling his administration as the Teapot Dome Scandal broke that year. Suspicion about Harding’s personal life was also burgeoning, centered around reports of his drinking (Prohibition was federal law at the time) and relations with women other than his wife.
Apropos the latter, the Library of Congress (LOC) is opening Harding’s letters from 1910-1920 to Carrie Fulton Phillips, his mistress until he assumed the presidency.
Mark Hartsell of the LOC provides an overview essay of the “affair” and explains how the Library obtained the collection and why it is being opened now: President Harding’s Letters Open to the Public | Library of Congress Blog.
A related LOC link describing some of the contents of the collection is here.