New England, the Pacific Northwest and Hawaii. Actually, that might be white men... Could have won whites as a whole in NJ, NY, CA and parts of the Midwest.
Correct, he won all 6 New England states, OR, WA and HI. Also Iowa. In New York it was really close and he might have won but I'm not 100% sure. What about Delaware and DC? I haven't seen any exit polls but I would assume he won the white vote in both.
In addition to these, Obama also won whites in Minnesota. He certainly won the white vote in New York, and he lost it narrowly in Delaware. Obama also lost whites narrowly in California-thus making 2012 the last election to date in which they voted Republican in that state. So that means Obama won whites in eleven states and D.C.
