Quick, pop over to the New York Times home page and check out the very cool graphical depiction of how the primary votes went state by state based on the criteria listed after the jump:
gender
age groups
black or white
income
education
It's fascinating and a bit scary when you see those blocks shift so dramatically one way or the other.
This will not be new info for Kossacks but it's a wonderfully engaging way of presenting potentially dry statistics in a dynamic fashion.
Go. Play.