美国的联邦预算（ federal budget ）是什么?

美国的联邦预算（ federal budget ）是什么?

The Budget of the United States Government is the President's proposal to the U.S.Congress which recommends funding levels for the next fiscal year,beginning October 1.Congressional decisions are governed by rules and legislation regarding the federal budget process.Budget committees set spending limits for the House and Senate committees and for Appropriations subcommittees,which then approve individual appropriations bills to allocate funding to various federal programs.
After Congress approves an appropriations bill,it is sent to the President,who may sign it into law,or may veto it.A vetoed bill is sent back to Congress,which can pass it into law with a two-thirds majority in each chamber.Congress may also combine all or some appropriations bills into an omnibus reconciliation bill.In addition,the president may request and the Congress may pass supplemental appropriations bills or emergency supplemental appropriations bills.
Several government agencies provide budget data and analysis.These include the Government Accountability Office (GAO),Congressional Budget Office,the Office of Management and Budget (OMB) and the U.S.Treasury Department.These agencies have reported that the federal government is facing a series of important financing challenges.In the short-run,tax revenues have declined significantly due to a severe recession and tax policy choices,while expenditures have expanded for wars,unemployment insurance and other safety net spending.[1][2] In the long-run,expenditures related to healthcare programs such as Medicare and Medicaid are projected to grow faster than the economy overall as the population matures.[3][4]