From the Post (emphasis added) ...

Democratic Sen. Barack Obama holds a 2 to 1 edge over Republican Sen. John McCain among the nation's low-wage workers, but many are unconvinced that either presidential candidate would be better than the other at fixing the ailing economy or improving the health-care system, according to a new national poll.

Obama's advantage is attributable largely to overwhelming support from two traditional Democratic constituencies: African Americans and Hispanics. But even among white workers -- a group of voters that has been targeted by both parties as a key to victory in November -- Obama leads McCain by 10 percentage points, 47 percent to 37 percent, and has the advantage as the more empathetic candidate.