The Missing White Poor: The point of this chart is that even though blacks and Hispanics are disproportionately poor, the largest group of poor people in America is ... white people.
Despite that fact, when you say "the poor," what pops into most people's heads is an image of a black person, probably due in no small part to the fact that poverty in America is represented in the media as a largely black phenomenon (I'm not just saying that; there's research backing that up).