Ben Carson is purely a values voter guy. He'll probably win Iowa (like Santorum and Huckabee did), which says more about the politics of Iowa than it does his viability as a national candidate. I know anti-establishment is in, but electing someone without executive experience - which is an Obama criticism as well - let alone any experience holding office or, say, running a large company is borderline idiotic. It's quite literally the hardest job in the world, and we still haven't evolved much past the "I'd like to have a beer with Bush" level of thinking.
We have a terrific federal system in which executive power is found at many levels of government, allowing (potentially) for diverse and experimental forms of governance. States often incubate innovation. We see over and over that the best presidents tend to be former governors. And here we have: 1) a real estate mogul and celebrity (Trump); 2) a retired neurosurgeon (Carson); 3) a former SoS and senator (Clinton); 4) a socialist senator (Sanders); 5) a former governor (Bush); 6) a sitting governor (Kasich); and 7) a sitting senator (Rubio) still realistically running. Why is Kasich still relegated to also ran status here? Bush I get - Bush fatigue, something from which Wilt Chamberlain surely suffered.