What would shutter and what would remain open during a US government shutdown?

Criminal prosecutions, including the two federal cases against former President Donald Trump, would continue. 

Most civil litigation would be postponed. U.S. embassies and consulates would remain open, but some foreign aid programs could run out of money. 

The top Democrat and Republican in the U.S. Congress have reached a deal to fund the government.

they fail to pass it by Jan. 19, parts of the federal government will begin to shut down.

Congress has extended government funding on a temporary basis 

Funding expires on this date for agencies that oversee agriculture, transportation, housing and veterans' services, among other areas.

The U.S. Postal Service would continue to deliver mail.