Resettlement Accountability National Security Act of 2015 This bill prohibits the admission of refugees into the United States until Congress passes a joint resolution giving the Department of Homeland Security authority to resume admitting refugees. Requires the Government Accountability Office to report to Congress on refugees who received benefits under any of the following programs: Medicare, Medicaid, disability insurance under title II of the Social Security Act, the supplemental nutrition assistance program (SNAP, formerly the food stamp program), and section 8 rental assistance.