What happens in a U.S. government shutdown?

(Reuters) - President Donald Trump and the U.S. Congress are racing to meet a midnight Friday deadline to pass a short-term bill to keep the U.S. government open and prevent agencies from shutting down.

In shutdowns, nonessential government employees are often furloughed, or placed on temporary unpaid leave. Workers deemed essential, including those dealing with public safety and national security, keep working, some with pay and others without.