A big win for Obama in North Carolina and a squeaker in Indiana for Clinton gives us some information to evaluate.
In Indiana, you can see the breakdown by county here.
In this map we can see Obama won Lake County. This is the suburban area adjacent to Chicago. Here you will find a huge black population and some elitists in the southern part of the county that are partial to Obama because of the Chicago media.
Marion County (Indianapolis) went for Obama. This county has a large black and significant elitist population.
Boone County, which is rural in the north but elitist in the south, went for Obama. Obama's support was centered in the suburbs of Indy, where the elitists reign in the Democratic party. Hamilton County, another suburban county of Indy, went for Obama. More elitists carried him through. Both of these counties are usually GOP strongholds and will likely go red in the general election.
Three counties have huge universities. Tippecanoe (Purdue), St, Joseph (Notre Dame), and Monroe (IU) all went for Obama.
Obama was also successful in Allen County, which includes Ft Wayne. This is the only county that is a true hodge podge of demographics that includes students, blue collar workers, blacks, and elitists.
Terre Haute, Evansville, Kokomo, Anderson, Muncie, and Marion are depressed industrial cities that have lost many manufacturing jobs over the years. Of the two, TH and Muncie have ISU and Ball State, but it was not enough for Obama to carry. These areas, along with the Louisville and Cincinnati suburbs, went for Clinton.
Out of 92 counties, Obama won 9 and was still in the race at the end. He won Illinois neighboring states Iowa, Wisconsin, and Missouri, but was not able to pull out Indiana and looks to fail in Kentucky. Indiana has a larger elitist population than many in other parts of the country may realize and by all rights, he should have carried this one.
Over the past decade, North Carolina has experienced a large influx of northeasterners due to the booming banking industry in Charlotte and the tech industry in the Raleigh-Durham area. Factor this in with the large university populations and a proportionately high black electorate, you can figure this one out.
Bottom line here is, the Reagan Democrats will likely not support Obama. He cannot win in November without them. Add to this the fact that Both of these states usually go Republican and Obama has not carried one large industrial state, you will then see why this campaign stands a good chance of faltering in the general election.