The campaigns have now moved behind the traditional snooping - you know, the sort of stuff where they figure out that those who patronize Red Lobster are more likely to vote for Obama, while those who prefer Olive Garden are more likely to favor Romney.
Whites now prefer Republicans by as much as 60%-40%, but about 80% of all minorities favor Democrats and the white proportion of the electorate (both presidential and midterm) has been declining a couple of points every four years.