How Will Iran Choose Its Next Supreme Leader?

Iranians will go to the polls next week to choose a new Parliament, as well as select the council that will in turn choose the country’s next Supreme Leader after Ayatollah Khamenei’s death. But how will the recent nuclear deal with the U.S. affect voting? William Brangham talks to NPR’s Steve Inskeep, who has just returned from a research trip in Iran, for more on the political scene there.