C+
Economically: He was given as sh**t a situation as you can be given, and he handled it as good as any leader in the world imo. Went to healthcare too fast, and that obviously hurt him and his party, but you can't say the economy is worse off than what it was.
Foreign Policy: Disaster. His response to Syria (the red line) and capitulation to Putin, ISIS, the disintegration of Iraq. Not all his fault, but he presided over it.
I'd pretty much agree with this other than that I'd severely dock Obama for getting little done with a super-majority in congress and give him props for getting Bin Ladin.