While the visiting US President was hailing Indian Prime Minister Modi as a "defender of religious freedom", lynch mobs were gearing up for a third night of rioting, the worst Delhi's seen in decades. What had started Sunday as clashes over the Hindu nationalist government's new citizenship law has since turned into a full-blown anti-Muslim rampage. With police accused of standing idle, opposition parties are calling for the resignation of Home Secretary Amit Shah. We'll measure the government's response