Here's a handy list of links to government websites:
Congressional Budget Office (CBO)
Food and Drug Administration (FDA)
General Accounting Office (GAO)
Centers for Medicare & Medicaid Services (CMS)
Office of Inspector General (OIG/HHS)
Government Printing Office
Office of Management and Budget (OMB)
U. S. Dept of Health & Human Services (HHS)
The U. S. House of Representatives
The U. S. Senate
The White House