At the Washington Post, John Cohen and Rosalind Helderman report:

The 2012 election is shaping up to be more polarized along racial lines than any presidential contest since 1988, with President Obama experiencing a steep drop
in support among white voters from four years ago.

They compare data from a recent poll with exit interviews from 2004 and 2008.  The results show that, while Obama is overwhelmingly the favorite among non-whites, he trails him among whites by 23 percentage points.

Cohen and Helderman say that Obama has lost support among whites even just recently.  Meanwhile, a whopping 91% of Romney supporters are believed to be white. We are, truly, a deeply divided nation.

Lisa Wade, PhD is a professor at Occidental College. She is the author of American Hookup, a book about college sexual culture, and a textbook about gender. You can follow her on Twitter, Facebook, and Instagram.