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.