The Daily Compilation of Presidential Documents, 1993 - the present, contains the official materials released by the White House Press Secretary. They include executive orders, proclamations, speeches, appointments, resignations, etc.
Alphabetical List of Resources
Wildly entertaining and informative, Dave Leip's Atlas covers presidential, U.S. senatorial, and gubernatorial elections, polls, and predictions. Coverage varies by state for the senatorial and gubernatorial elections, but the presidential elections covers 1789–2016.
Produce comprehensive business and residential lists as well as detailed demographic reports. Assess business viability, perform market and site location analysis, create sales leads and/or marketing mailing lists.
DPLA connects people to the riches held within America's libraries, archives, museums, and other cultural heritage institutions.
This site provides detailed information on not only the two main political parties, but the big three Third parties—Constitution, Green and Libertarian, and smaller Third parties such as the Prohibition Party, the Piraty Party and the Socialist Workers Party.