As it stands, around three-quarters of the government, including vital services and government agencies like the military and the Department of Health and Human Services are fully funded till September 2019.
However, the remaining quarter of the government could face disruption, and hundreds of thousands of federal employees will see their jobs getting disrupted.
All essential services will continue, regardless of funding
Essential services, even those that have not been funded yet, will continue to function so there should be no disruption when it comes to day-to-day lives of Americans.
However, essential agencies who have not been funded yet, like the departments of Justice, Homeland Security etc., will see their employees having to work without pay till such time a new funding agreement is reached.
Non-essential services are likely to be shuttered
Non-essential government services, however, might cease to function.
This means that many iconic tourist attractions like national parks, museums, and even the iconic Washington Monument will be forced to shutdown till such time a new funding agreement is reached.
Understandably, this might come as a big disappointment to many, especially those who had planned outings to these places for the holiday season.
The partial government shutdown in numbers
In terms of numbers, over 420,000 federal employees deemed essential for the functioning of the government will continue to work without pay, including 41,000 law enforcement officers and 150,000 Homeland Security employees.
However, more than 380,000 federal employees, including NASA, Commerce department, Housing and Urban development, Internal Revenue Service, and National Park Service employees, will be 'furloughed' or barred from doing work.
Since 1976, the US government has shut down 21 times
Including the three 2018 shutdowns, there have been 21 shutdowns since 1976, when the Congressional Budget and Impoundment Control Act was introduced to establish the budget process.
However, only three are considered significant, two during the Bill Clinton regime and one during Obama's regime.
The longest was in December 1995, when it lasted for 21 days. The Obama-era shutdown lasted for 16 days.