A partial shutdown of the U.S. government will begin at midnight on Monday if Republicans and Democrats fail to agree on a funding bill.
In a government shutdown, spending for essential functions related to national security or public safety would continue along with benefit programs such as Medicare health insurance and Social Security retirement benefits for seniors.
But civilian federal employees -- from people who process forms and handle regulatory matters to workers at national parks and museums -- would be furloughed.
The last government shutdown ran from December 16, 1995, to January 6, 1996, putting about 800,000 federal workers on furlough.
Here is a roundup of the expected impact of a shutdown.