He is Libertarian, not "Conservative".
He is a Christian Scientist.
I know little about them. Do thye pass the "Real Christians" muster of Evangelicals?
Robert Duvall and his lovely wife were on James Robinson's show recently--the man is a definate born again Christian. He's made a documentary about a country singer (I can't remember his name, it's Joe Bob or something similar to that), which shows how the singer turned his life around from women and drinking and came to know Christ.