He self-describes as a Dem. I'd call him a Conservative Christian Democrat. That makes him a pretty rare breed of cat, IMHO.
And FWIW, I've not read Ender's Game. I've tried to read a couple of his other books (don't remember the titles, they were so unremarkable) and I thought they were pretty much unreadable. Came across sort of like a Tom Clancy-lite, without the character development and plot.
Might have been the Alvin Maker series, or the Homecoming series.
You ought to give Ender’s Game a try. It’s required reading at OCS I’ve heard.
actually, he is a Mormon.