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NPR's Steve Inskeep interviews President Obama at the White House about the Iran nuclear deal. Kainaz Amaria/NPR hide caption

Thousands of people gather at the Paris Hotel in Las Vegas for the Nevada State Democratic Convention on May 14, 2016. Michelle Rindels/AP hide caption

A gender neutral sign is posted outside a bathrooms at Oval Park Grill on May 11, 2016 in Durham, North Carolina. Sara D. Davis/Getty Images hide caption

A screenshot of the Two-Way blog's midday update live series, "Cereal," a play on This American Life's hit spin-off show. NPR hide caption

Carl Paladino speaks before a rally for Republican presidential candidate Donald Trump on April 10, 2016, in Rochester, N.Y. Mike Groll/AP hide caption

Activists hold a rally to protest the Trans-Pacific Partnership (TPP) in front of the White House in February 2016 in Washington, D.C. Olivier Douliery/Getty Images hide caption

Republican presidential candidate, Donald Trump addresses the crowd during a rally in April in Milwaukee. Charles Rex Arbogast/AP hide caption

Cokie Roberts appears at the National Press Foundation's 26th annual awards dinner in 2009. Brendan Hoffman/Getty Images hide caption

Democratic presidential candidates Hillary Clinton and Sen. Bernie Sanders stand on stage before a Democratic presidential primary debate March 6 in Flint, Mich. Charlie Neibergall/AP hide caption

Nina Totenberg interviews the late Supreme Court Justice Antonin Scalia in 2012. Kainaz Amaria/NPR hide caption

Former Florida Gov. and Republican presidential candidate Jeb Bush speaks to supporters as wife and son look on during a reception thrown by the Right to Rise SuperPAC, prior to announcing his candidacy. Joe Raedle/Getty Images hide caption