Terry Gross

Silver analyzes polls and predicts election outcomes on his website, FiveThirtyEight. This year's is "maybe the most fascinating nomination race that we've ever seen," he says.

Grey explains how he brought his decadent Cabaret character to life on both the stage and screen, and reflects on coming out as gay after years of living closeted. His memoir is Master Of Ceremonies.

New Yorker writer Jill Lepore examines the history of polling in America. She tells Fresh Air's Terry Gross that today's polls may be less reliable — and more influential — than ever before.