evidence: In previous shutdowns, national parks have shuttered as rangers were furloughed and facilities closed. The National Institutes of Health would also be prohibited from admitting new patients or processing grant applications, according to the nonpartisan Committee for a Responsible Federal Budget. Some Internal Revenue Service employees could also be furloughed, potentially resulting in a delay of loan approvals. Air traffic controllers and Transportation Security Administration officials could also be forced to work without pay. The 2018-2019 shutdown prompted widespread air travel delays as some TSA agents and air traffic controllers called off work. While the State Department would likely continue issuing passports, some passport offices in federal buildings closed due to a shutdown could also shutter. [...] It ran from Dec. 22, 2018 to Jan. 25, 2019, during the Trump administration. At 34 days, it was the longest government shutdown in history by a significant margin, as most shutdowns in recent decades have lasted two weeks or less. [...] Government Shutdown Looms—Again—As Election Complicates Latest Fight (Forbes)