I've never undersood what's wrong with a Christian claiming Jesus as a favorite philosopher. President Bush is a committed Christian and if secularists think that makes him an American C.S Lewis, its their loss. Faith has a prominent champion in the post-modern age.
Correct me if I'm wrong (This is FR, so I know you all will) but it seems to me that the two leaders striving most mightily to deal with the real world in a moral sense are also the two most committed evangelical Christian heads of state, Bush and Blair.