Our political leadership can certainly make things harder than they have to be via self-inflicted wounds. Our centrifugal forces might not be as strong as we like them to be, but how strong are they compared to the rest of the world?
Say Nick Saban (good political leadership) retires, and Alabama hires me to replace him. I'm a poor coach, poor leader, etc. Alabama is screwed, right? Well, not if their competition is high school JV teams. Will Alabama be operating at the same effectiveness as before? No. Are they still the dominant team in the sport? Yes.