Geneive Abdo, Iran analyst at the Century Foundation, says the mass demonstrations challenging Iran's Supreme Leader, Ayatollah Ali Khameni, are unprecedented. "It's believed that he more or less authorized the rigging of this election," says Abdo.

Geneive Abdo, Iran analyst at the Century Foundation, talks about the religious dimensions of Iran's political crisis and the challenges it poses for the Islamic Republic’s cleric-run establishment.