I did the math, and it looks like Romney won white voters in the south as a whole with 71% or 72% to Obama's 27%. Even with that, the South only makes up about 30% of the nation's white votes, so whites outside the south are still Republican (probably about 54% Romney). They're Republican everywhere outside New England and the West coast. So yeah, the Democrats have a white problem. And its natural (if elections were to maintain competitive) that if Democrats get a big majority of the non white vote that is increasing in its share in the electorate, that they also lose support from white America.
54% of the majority group outside one region, while they heavily carry minority votes, don't seem a problem to me. Yes it would be a problem if minorities was less loyal to the Democrats, but honestly the republicans don't really leave the minorities a real alternative.
