"He pointed to the recent recession but also longer-term changes in the economy such as globalization, automation, outsourcing, immigration, and less unionization that have pushed median household income lower."[US poverty on track to rise to highest since 1960s, By Hope Yen, Associated Press July 22, 2012]
I've emphasized immigration because it's usually unmentioned and unmentionable in the context of poverty. Immigration increases poverty in America two different ways.
One of the women featured in the AP article is a white American woman who is "living on disability, with an infant daughter and a boyfriend, Garrett Goudeseune, 25, who can't find work as a landscaper. "
I'm not surprised that a white landscaper can't find work. This is exactly the kind of person who would be helped by an immigration moratorium.