I was kind of surprised to see that it was really his voice in the credits. He parodies conservative views. He earned points in my book. If you're able to laugh at yourself it says a lot.
http://www.hulu.com/watch/181988/family-guy-rush-to-excellence#s-p1-sr-i1
http://www.hulu.com/watch/181988/family-guy-rush-to-excellence#s-p1-sr-i1