If you REALLY want to kick G.W. bush around, you must check out this site:

http://thebots.net/GWBushSampleArchive.htm

where you will find literally thousands of individual phrases and entire speeches by Bush from 2001 to 2004.

As an example, check out GWB-individual-phrases-2000_2001.zip in this folder.

All recordings from official presidential speeches are in the public domain.