Per the 2010 census (wiki) the racial breakdown of OH is
White: 82.7% (Non-Hispanic Whites: 81.1%)
Black or African American: 12.2%
All of the 12.2% of ‘Obama types’ are not voting age and of those that are, many don’t bother to vote. Not sure how much of a factor they are. Of whites, there are the unions and college campuses, the traditional Democrat strongholds. Again, college campuses by themselves aren’t that much of a factor if the rest of the state is motivated to vote. So it’s down to middle income whites - non college affiliated and both union and non union. Middle income whites are trending Romney nationally and if that is an indication, I think by mid to end of next week Romney will be 2 to 3 points up in OH.
Columbus has been a magnet for gays and their sympathizers for years. They are starting to add up.