Since some of the Republican candidates seem to have indicated that they don't believe in evolution, let me offer my perennial warning on this subject -- people who don't believe in evolution are dead wrong, but there are actually a very large number of them in the United States -- depending on how you count, it's about half of the population. So taking the creationist line or
hesitating is a very understandable reaction for a practical politician.
This article available online at:
http://www.theatlantic.com/politics/archive/2007/05/evolution/42438/