These polls are always misleading. They never explain that a significant number that don’t “approve” of obama do so because isn’t liberal enough. That isn’t GIVING them enough stuff, that isn’t putting “rich” people in jail, that isn’t confiscating enough., that isn’t demonizing enough, that he hasn’t stopped global warming, and on and on
No doubt true. However, the people unhappy for this reason are probably less likely to turn out than those unhappy for the opposite reasons.