How much of the racial voting differences are simply due to age and income?

[Sbane]

If California exit polls were right, and 28% of the electorate was 18-29 years old, then at least in California almost all of the trend to Obama could be explained by that. At first I thought that number was completely wrong, but now I am thinking there may have been a huge youth turnout to support Prop 30 and they voted for Obama as well, and the youth in California is much more Asian and Hispanic than the electorate at large.

[Sbane]

Yes, it is likely Obama won the white 18-29 vote outside the south. Also Romney won that group 51-44, not 54-45.