Despite the passage of a spending bill Thursday night in the House that included $5.7 billion for increased border security that could be applied to construction of a wall, Republicans did not appear to have the votes necessary in the Senate to send the measure to the president's desk before a midnight deadline to keep the government open. But at the 11th hour, Donald Trump succumbed to pressure from his far right-wing base and chose to shut down the government for a $5 billion down payment on his vanity wall.
Nine of the 15 Cabinet-level departments will shutter, along with dozens of agencies.
Most of the government has been funded through 2019-but the partial shutdown would affect the Department of Homeland Security, the Justice Department, the Interior Department, the State Department and the Department of Housing and Urban Development.
Q. Will workers get back pay when it's over?
On the other end, only 14% of homeland security employees would be furloughed.
Social Security checks will still go out. Doctors and hospitals will receive their Medicare and Medicaid reimbursements. The U.S. Postal Service, busy delivering packages for the holiday season, would also be unaffected by any government shutdown since it is an independent agency.
Caplan added that the Environmental Protection Agency also plays a key role in coordinating disaster responses to chemical spills and other toxic accidents.
"The agency is always going to figure out a way to work around the shutdown", he continued, "but there is a real, tangible, immediate effect on border patrol operations". Tens of thousands of federal workers are off the roads.
In central Washington, the most obvious impacts would be to the Okanogan-Wenatchee National Forest, which has had to close its office and visitor center doors in every prior budget shutdown.
Some attractions are staying open thanks to funding from states and charitable groups.
"In the event of a government shutdown national parks will remain as accessible as possible while still following all applicable laws and procedures", National Park Service (NPS) Chief Spokesperson Jeremy Barnum told The Daily Caller News Foundation. The memorial itself is closed until March for repairs to the loading dock, but visitors are still being taken on a narrated harbor tour of Battleship Row and the surrounding area.
The national parks - and the tourists they bring - are also an economic boon for the state.
During the last shutdown, the Statue of Liberty was closed for two days before the state of NY chose to pony up the money necessary to keep it open. While Congress is legally required to pay federal employees who worked during the shutdown, there's no law requiring the same treatment for nonessential workers.
In 2013, the government repaid even furloughed workers what they would have earned had the shutdown not happened. In the past, Congress had to pass separate legislation to make sure that military members continued to be paid.
Federal workers are exempted from furloughs if their jobs are national security-related or if they perform essential activities that "protect life and property".
According to information compiled by Senator Patrick Leahy's staff, about 420,000 federal employees deemed essential will have to work without pay, and another 380,000 will be furloughed.
More than 380,000 employees will be furloughed - including almost all of NASA and Housing and Urban Development and 41,000 Commerce Department employees. During President Ronald Reagan's two terms, there were six shutdowns, typically just one or two days apiece.
For many staff at federal labs in Boulder County and across Colorado's Front Range, Friday likely brought a sense of deja vu as workers braced for a threatened federal shutdown.