đź—„ Political History
John G. Nicolay Papers (Library of Congress)
Nicolay served as Presidet Abraham Lincoln’s personal secretary. He later worked on a 10 volume biography of Lincoln with John Hay (Lincoln’s other private secretary during his presidency). The Library of Congress offers some of his papers through their website.
The American Presidency Project (U.C. Santa Barbara)
Includes a treasure trove of the most important presidential papers from George Washington to Donald Trump. The archive also includes media files from many presidents since World War II.
The Annals of Congress, Register of Debates, and Congressional Records
Fully scanned copies of congressional debates and reports—in both the House and the Senate—until 1873.
The Miller Center (The University of Virginia)
The Miller Center is a nonpartisan affiliate of the University of Virginia that specializes in presidential scholarship, public policy, and political history.
A comprehensive source for biographies of politicians.
Ulysses S. Grant Papers
A comprehensive archives of Grant’s correspondence, publications, and presidential papers from his military career and presidency.