The American Presidency Project at the University of California, Santa Barbara has archived all Presidential Signing Statements from Herbert Hoover through George W. Bush.

• Presidential Signing Statements Hoover - G.W. Bush

You can search or browse by year. The signing statements are part of a much larger documents section that includes executive orders, proclamations, "fireside chats" and more.

The Project site also includes a "data" section with information such as a table of vetoes and "success rate", a section on presidential elections data (statistics) and more.