If there’s a theme we’re likely to hear from candidates running for president in 2016 it’s the growing inequality gap in America today. Their prescriptions will differ — and debate will go on about how effective their plans could be — but on both sides of the aisle, politicians are confronting income disparity. It’s an issue Nobel Prize winning economist Joseph Stiglitz has been writing about for decades. In a new book, “The Great Divide: Unequal Societies and What We Can Do About Them,” Stiglitz examines the causes and consequences of an unequal society and offers solutions for what we can do about it. He joins Diane in studio to talk about inequality in America today.