I'm British, so I can't really speak to the US circumstances. And British ideas on politics tend to be rather different to US ones, too!
I'm with DAW, though, and while I don't read everything they publish -- not enough hours in the day! -- I think they have writers from right across the spectrum: Lisanne Norman, Edward Willett/E. C. Blake, C J Cherryh on the more conservative end of things (all great writers, too), to people like me on the left, and all sorts in between.
As I said, I like a mix.