FOR HISTORICAL CONTEXT:
HeinOnline is a rich source of historical legal materials. In addition to large collections of law reviews, cases, Congressional materials, Presidential documents, and state legal resources, this database provides a number of specialized libraries of potential interest.
Some representative libraries include: the Pentagon Papers, Civil Rights and Social Justice, and Slavery in America and the World.
ProQuest Congressional provides access to a vast library of government publications.
Some representative collections include Presidential Papers, 1789 onwards, Congressional hearings from 1824, House and Senate reports, 1817 -
ProQuest History Vault - Primary resource materials.