 The Republican chair of the House Oversight and Accountability Committee holding the hearing, James Comer, says Cheadle should resign. The U.S. ambassador to the United Nations is on a mission to Haiti. She's trying to rally more support for a security force from Kenya intended to help Haiti's police reestablish order. NPR's Michelle Kellerman has more. State Department officials say that Ambassador Linda Thomas-Greenfield has made it a priority to address the security and humanitarian crisis in Haiti...