This argument that the current GOP field is extremely weak is perfectly put:

So far, the GOP is not constructing a candidate who can prosper in the states in which the 2012 election will turn. And the two major candidates, Romney and Perry, fail to deliver outside their own narrow, predictable records. Romney’s governorship in deeply blue Massachusetts is a waste and provides no momentum in the heartland, especially given his role in leveraged buyouts that helped transfer America’s manufacturing jobs to Asia. Perry’s governorship in red Texas is equally a waste, as the GOP hardly needs a hog-calling country parson lite from West Texas to carry the Old South. How does Perry go North with the shopworn baggage of Johnny Reb superiority and an unapologetic evangelical paternalism?