Who knows? The great majority of US poor are white. Masses of these live outside the cities, and don't have access to things like food pantries and free children's lunches when school isn't in session. They don't have access to much of anything at all. They can't afford to move to the city. We have people out here who survive in old abandoned farm buildings and dumped RVs. There's nowhere to go, no way back out of poverty today. And we got very, very tough on the poor.
Maybe just a side issue, but we refer to poor people of color as "disadvantaged," and poor white people as "white trash." Liberals have done their part in reinforcing those stereotypes. What Americans can't seem to come to terms with is the fact that our deregulated capitalism has, since the 1980s, proved to be a grotesque failure. The overall quality of life in the US was rated at #1 when Reagan was first elected -- far from perfect, but much better. By the time Obama was elected, this had already fallen to #48.