Marilyn Geewax, senior business editor, NPR
Erin Currier, director of the Economic Mobility Project at the Pew Charitable Trusts
As former Florida Gov. Jeb Bush made the media rounds for his book Immigration Wars, he also addressed what he sees as the biggest structural challenge facing America. "We're no longer socially mobile as a country," he told MSNBC, voicing the concerns of many Americans.