I wrote this a couple of days ago:

Black Democrats are voting largely along racial lines. With few policy differences between the candidates, Obama won 92 percent of the black vote in Mississippi, 91 percent in Wisconsin, 87 percent in Ohio, 84 percent in Maryland, and 84 percent in Texas. White Democrats are voting significantly less along racial lines, but there are still divisions. Clinton won 70 percent of the white vote in Mississippi, 66 percent in New Jersey, 64 percent in Ohio, 55 percent in Texas, and 52 percent in Maryland. (Obama won among whites in Wisconsin, 55-45.) In Mississippi, 31 percent of voters in the Democratic primary said race was an important factor in their decision. Of those, 62 percent voted for Obama. In Ohio, 20 percent said race was an important factor. Of those, 59 percent voted for Clinton. And those are just the people who actually admitted, to an exit pollster, that race was an important factor to them. The real numbers are probably higher, both blacks in Mississippi for Obama and whites in Ohio for Clinton. There seems to be no chance Clinton can win more black votes against Obama, so her only hope is to encourage more whites to vote along racial lines. No one in the campaign would ever say such a thing – they certainly haven’t to me – but what white voters do in Pennsylvania on April 22 will be a critical indicator of where Clinton’s campaign is going. Will they vote like whites in Mississippi, New Jersey, and Ohio?

Now, there is this, from the new Quinnipiac poll:

The primary vote between Obama and Clinton splits sharply along racial lines, with her advantage coming from stronger support in every contest from white voters. For example, Clinton leads 59 – 34 percent among white Pennsylvania likely primary voters, while Obama leads 73 – 11 percent among black Democrats.

My guess is that we are seeing both the Bradley Effect and the Reverse Bradley Effect at work in the new poll — understating white support for Clinton and black support for Obama. If that is true, the actual voting results might be even more sharply divided.

I have a new story about Obama, black turnout, and the racial divide coming out in the new NRODT Friday.