On August 8, 1974, President Richard Nixon announced his resignation, making him the first U.S. president to do so. His resignation came in the wake of the Watergate scandal, a major political event that significantly impacted American politics.
https://www.fox32chicago.com/news/50-years-ago-nixon-resigns-presidency
https://museum.archives.gov/featured-document-display-50th-anniversary-nixons-resignation