The SCOTUS and The Constituition

According to the Volokh Conspiracy you can download everything the US Supreme Court has ever ruled about the US Constitution.

http://www.volokh.com/2013/01/13/free-online-constitutional-law-treatise-from-the-library-of-congress-2/

Here are the direct links:

http://www.gpo.gov/fdsys/pkg/CDOC-108sdoc17/pdf/CDOC-108sdoc17.pdf

http://www.gpo.gov/fdsys/pkg/GPO-CONAN-2010/pdf/GPO-CONAN-2010.pdf