I don’t know that the question has a single “true” answer, but in this Pajamas Media article, SF legends Orson Scott Card* and Jerry Pournelle, along with relative newcomers Tom Kratman and Larry Correia, provide some interesting insights.
It was no surprise that Baen Books (for whom I read slush) should be mentioned so prominently, but I particularly liked this bit, from OSC:
Back when I cared, most of the writers of my generation were so extremely leftist in their formal opinions, and so extremely elitist in their practices, that it would be difficult to discern where they actually stood on anything. It’s as if the entire Tsarist aristocracy fervently preached Bolshevism even as they oppressed their peasants. But that view is based on observations back in the mid-1980s. Since then, my only exposure to their views has been the general boycott of mine. In short, I’m their Devil, but I have no idea who their God is anymore.
The last sentence is hyperbole, as I think Kratman, John Ringo, and a few other Baen authors may have better claim to being the real bugaboos of the SF left.
One last thought, speaking of becoming more conservative … or at least seeming more conservative: I thought last night’s State of the Union speech was quite good. I appreciated the tone and the balance, and look forward to seeing whether both continue.
* Full Disclosure: OSC is a former employer of mine. I attended his “Literary Boot Camp” and later had the pleasure of reading slush for his magazine, Intergalactic Medicine Show.