Tens of Millions.

Desmond concludes that one of the real issues with American poverty today is not just that we don't have the right anti-poverty programs, but that we have marginalized and stigmatized poverty in a way that hinders the poor from getting even the aid that is available. For Desmond, another element of poverty's persistence in the United States involves consumers who actively undercut the wages and power of workers. Notably, Desmond is not interested in simply documenting the statistics on the pervasiveness of poverty in the United States. The United States, Desmond notes, is "the richest country on earth", but the problem of poverty is so enormous that it affects Americans across a wide economic spectrum. [Extracted from the article]