Passport service workers are not considered essential, so if your application for a new or renewed passport isn’t already in the works, expect a delay. During the last shutdown, the 200,000 passport applications went unprocessed, according to a Washington Post report at the time. Some 20,000 to 30,000 applications by foreigners for entry visas also went unprocessed each day.

Ric Francis/AP/File
A US Customs & Border Protection officer checks the passport and paperwork of a visitor at Los Angeles International Airport in this file photo.