An almost exactly analogous argument could be used to "prove" that Wikipedia would entirely fail [1]. Replace "Great political ideas" by "High-quality encyclopedia articles" etcetera. I don't personally think much of Republican policies, but I'm glad they're at least giving things like this a go. I could wish, however, that they'd spoken with more people who have real insight into how social websites work. They could have started with the founders of Reddit, and a bunch of other YC folk.

[1] Yes, I'm well aware some people claim that Wikipedia has failed. But arguing with people who use "failure" to describe a site with Wikipedia's impact isn't worth the time.