History Vault: American Politics and Society‎  (ProQuest)

American Politics and Society in the 19th and 20th Centuries: database with documents from the Roosevelt, Truman, Eisenhower, Kennedy, Johnson, and Nixon administrations.
Includes 4 separate modules:
1) American Politics and Society from Kennedy to Watergate, 1960–1975‎
2) Immigration: Records of the INS, 1880-1930‎
3) Law and Society since the Civil War: American Legal Manuscripts from the Harvard Law School Library‎
4) Thomas A. Edison Papers‎.
For researchers and interested parties.