The answer Walker should have given is this: Religion is a belief system, science is a search for knowledge using a methodological approach based in observation and testing that is above your head dipshit.
He should have asked the media to explain their version of evolution than tell them whether he believed that or not.
No answer he gives will suit them. He should just mess with them. The goal should be to not win the argument. The goal should be to make the media go in circles until they are tired of looking foolish.