Weisman essentially asserted that urban areas -- not just Detroit and Minneapolis, but Atlanta, and Austin -- are not a part of America's geography at all. What's even more telling is that he obviously thought this was non-controversial -- even self-evident.
The progressive vs. pragmatic, head vs. heart dichotomy is an insidious one. You are presuming an awful lot when you call something “pragmatic”; you are presuming that it will be effective -- indeed more effective than the alternative. Your are also presuming that the candidate calling for less radical change is the pragmatic one, and therefore a safer bet when it comes to electability. But that’s not necessarily pragmatism; that’s caution, or even timidity.