American Presidency ProjectPresidential public documents: "...The Messages and Papers of the Presidents: 1789-1929; The Public Papers of the Presidents: since 1929; The Weekly Compilation of Presidential Documents: 1977-2009; The Daily Compilation of Presidential Documents: post-2009; ...our archives contain data related to Midterm Elections, U.S. Party Platforms (from 1840), Statements of Administration Policy, White House Press Briefing Transcripts, Presidential Debate transcripts." Includes some elections statistics and a media archive. https://www.presidency.ucsb.edu/