I have produced two songs that use samples of famous people making
public addresses.

One is of George W. Bush.

The other is of Malcolm X.

I would like to include both of these songs on my forthcoming album.  

I hear that it is legal use these samples without paying royalties
because they are public domain.

Can you find me proof that this is true?

Thanks!

The president's speech is most certainly publlic domain.  He is an
"employee" of the Federal govt. (although in his own mind, he IS the
govt.).

What a good idea

Although they are definitely public domain, it would be an idea to do
something mildly illegal - like distort the words
- the publicity would be wonderful

Haha trust me, with a guy like Bush in office, no distortion is necessary!

Listen to the track here: 
www.thebeatcounselor.com/ThereIsNoHere/Surrealization.mp3

Cheers!