"At a personal level, they won't want to look like they are ratifying her racial politics or the racist behavior of white voters."

I simply don't understand why Hillary's white supporters are considered racist. At least 40% of them support Obama, and oftentimes over a majority, especially in some of the early voting red states where there are hardly any blacks at all.

In contrast, up to 93% of blacks support Obama. Since there is hardly any difference in policy between Obama and Clinton I can only conclude blacks are supporting Obama because of his skin color. Yet I never hear anyone in the media ever talking about "the racist behavior of [black] voters."