Provided by the University of Michigan Digital Library. Public Papers of the Presidents of the United States, 1929-2000, compiled and published by the Office of the Federal Register, National Archives and Records Administration. Provides information such as print and online biographies, listings of cabinet members, election results, audio files, and historical documents.

Includes federal branches, offices and agencies.

Hosted at the University of California, Santa Barbara.

(Bowdoin College Library) A comprehensive LibGuide on Impeachment of an U.S. President from Andrew Johnson to Donald Trump.