According to the Roanoke Times, she should be ashamed for stating the obvious:
Taking the low road on raceSurely these guys can find a bigger nit to pick than this. Perhaps Hillary didn't get all her adjectives in the order that pleases these guys, but to suggest that she meant to say that white people are harder working than black people is, in itself, a bit racist, if you ask me. Only a racist could find offense in such an innocuous phrase.
Democratic presidential candidate Hillary Clinton sunk to a new low in an interview with USA Today. She was trying to claim that she had a "broader base to build a winning coalition on" if she were the nominee. What she meant by that soon became clear. "Sen. Obama's support among working, hardworking Americans, white Americans, is weakening again."
Perhaps fatigue caused Clinton to suggest that only white Americans are hardworking, and that Sen. Barack Obama is losing support among white voters, when polls clearly show he is not. (link)
But I'm guessing there was another motive in play here, having nothing to do with Hillary and everything to do with Mr. Hope & Sunshine.