This map (a copy of which can be found here) takes the standard red-blue map of how people voted at the last presidential election, and then factors in race (and for some reason Mormonism!). The key thing to emerge (aside from the fact that the Mormons are well on their way to creating a breakaway state) is that Republicans exist as kind of buffer or intermediate zone between between non-Whites who vote Democrat and Whites who do so, and probably help "facilitate" the latter.
