U.S. Constitution Annotated

The content of the U.S. Constitution Annotated was prepared by the Congressional Research Service (CRS) at the Library of Congress, and published electronically in plaintext and PDF by the Government Printing Office. Dating back to 1911, the initial online annotations were published in 1992.

This edition is a hypertext interpretation of the CRS text, updated to the currently published version. It links to Supreme Court opinions, the U.S. Code, and the Code of Federal Regulations, as well as enhancing navigation through linked footnotes and tables of contents.

LII is grateful to Professor William Arms and the CS 5150 "Save the Constitution" team: Anusha Chowdhury, Garima Kapila, Tairy Davey, Brendan Rappazzo, and Max Anderson for their work on the project. Special thanks go to Josh Tauberer of GovTrack and Daniel Schuman of Demand Progress for their help with the data.