Seriously? Does it friggin' matter?
Honestly, I don't know except that he won the most populated states since he captured both the popular and the electoral vote. He won New York and California, so if you're believing that Romney winning Nebraska and Oklahoma, South and North Dakota are far more important, you're now officially grasping for straws.
Obama got most of his popular vote from New York and California, the two flakiest states in the country. Meanwhile, Romney won 30-something states by a comfortable margin, and Obama won states like Ohio and Florida by razor thin margins.
Barry has no mandate. Half the country hates his guts.