Historians may eventually conclude that Barack Obama's sole positive contribution to the country was that he kept John McCain from being president.
The only smart thing McCain did was select Palin as his running mate, and while the country laughed at her and said it was a dumb pick I credit her with being the impetus for the later founding of the Tea Party because she was the first to use common sense as a guiding principle.
I think Obama has done another positive thing. He has single handedly exposed for all to see the vile toxic racism that pervades the black subculture towards whites. Many suspected it, but there was hope it was just endemic to isolated pockets within disfunctional inner-cities, but we all know now it it virtually universal, and an integral part of “the black experience”. Practically every last one, with exceptions you can count on two hands, viscerally hates whitey.