Deficit reduction in the United States refers to taxation, spending, and economic policy debates and proposals designed to reduce the Federal budget deficit. Government agencies including the Government Accountability Office (GAO), Congressional Budget Office (CBO), the Office of Management and Budget (OMB), and the U.S. Treasury Department have reported that the federal government is facing a series of important long-run financing challenges, mainly driven by an aging population, rising healthcare costs per person, and rising interest payments on the national debt.