Weeks after President Trump’s ban on travel for citizens of seven Muslim-majority countries, the global conversation has turned to religion and the state. Religious figures like Pope Francis have called the ban hypocritical, and political leaders like Iran’s foreign minister say it’s a “great gift to extremists.”

Writer and commentator Reza Aslan has been a powerful voice promoting interfaith dialogue in domestic and international politics. Aslan joins us with his perspective on that conversation and to talk about his upcoming CNN documentary series, Believer, which looks at how different faiths engage with politics worldwide.