Is Garrison Keillor a believing Christian? If he's not, he had me fooled. I'm surprised the ACLU hasn't called for a cutoff of public funds to his show. Too many hymns and (respectful) references to church and Jesus.
I don't know if he is or not.
When I was a kid, I assumed he was Lutheran... Of course, i was Lutheran at the time, and having surgery in a Luteran hospital, and all of the nurses were Lutherans.