From the AP (via TPM):

"They are getting votes, to be sure, because of their race or gender. That's why people tell me Hillary doesn't have a chance of winning here," the former president said at one stop as he campaigned for his wife, strongly suggesting that blacks would not support a white alternative to Obama.Clinton campaign strategists denied any intentional effort to stir the racial debate. But they said they believe the fallout has had the effect of branding Obama as "the black candidate," a tag that could hurt him outside the South.