Major Cities where Whites Voted for Romney?

[Miles]

For New Orleans, my estimate (based on the 2008 results) was Obama winning whites around 51/47. The white-majority precincts are collectively 78% white and voted for him 57/41.

Obama almost certainly won white by a larger margin in 2012 because 1) the parish itself swung to him and 2) the white liberal contingent of the city is becoming increasingly more influential.

[Miles]

Obama probably received a majority of the white vote in New Orleans proper.

Yep - in 2008, he won the white-majority precincts 57/41-ish, and the white liberal presence has only grown since then.