Resettlement Accountability National Security Act of 2017 This bill prohibits the admission of alien refugees into the United States unless Congress passes a joint resolution giving the Department of Homeland Security authority to resume admitting them. The Government Accountability Office shall report on: (1) the national security impact of refugee admissions; and (2) specified costs of providing refugees with benefits under Medicare, Medicaid, disability insurance under title II of the Social Security Act, the supplemental nutrition assistance program (SNAP, formerly the food stamp program), and low income rental housing assistance.