Negotiations between the Democrats of the Congress and the Trump government over the president's demands for a border wall have so far failed to reach an agreement, so the closure is likely to continue after Christmas. It is even possible that it could still run when the new Congress begins in early January.
Here's the latest on the negotiations and the prospects for partial closure:
The Senate has postponed the Saturday afternoon without consultation reopening the government, and although a pro-forma Senate meeting will be held on Monday, the next one is Actual session not scheduled before Thursday.
Legislators can travel home for Christmas and need not worry about being recalled until a deal can be reached. However, GOP leaders told senators they would not have to return unless there is a deal by Thursday. In this meeting, sources CNN reported.
What are the next possible steps?
There is a remote possibility that a deal will be made earlier and in the unlikely event that a deal is made. On Monday, the pro forma meeting could be used to pass by unanimous vote or vote which would only require a senator.
The House Democracy, Nancy Pelosi, and the Senate Democratic leader, Chuck Schumer, have said the New Democracy-controlled House of Representatives will pass a bill to stop the closure when it enters the new Congress.
"If President Trump and the Republicans decide to continue this Trump shutdown, the new Democratic majority of the House will swiftly pass laws to reopen the government in January," Democratic leaders said after the closure had begun.
Where are the negotiations between the President and the Democrats?
The key issue in spending calculations is President Donald Trump's demand for a $ 5 billion border wall. And so far, there is still no agreement to dissolve the dispute and reopen the government.
House Republicans passed a spending bill last week that included an additional $ 5 billion for the wall, but the legislation is considered dead on their arrival in the Senate when the Democrats said they would not support it. For every spending bill, at least some Democratic votes are required to pass in the Senate.
Vice President Mike Pence proposed investing $ 2.5 billion in border security, including the Wall, in an interim bill for spending on Friday night and Saturday afternoon with Schumer. Three sources familiar with the matter told CNN.
Several sources indicated that the proposal contained political additions and restrictions to fill the gap. The Democrats, however, said the number and associated details were unacceptable.
Following the meeting on Saturday, a spokesman for Schumer said: "The vice-president came for an interview and made an offer, but unfortunately we are still very far apart."
Which parts of the government are affected?
The closure affected key parts of the federal government, including the Department of Homeland Security, the Department of Justice, the Department of Home Affairs, the State Department and the Department of Housing and Urban Development.
But just because a federal ministry runs out of money does not mean that all activities are stopped immediately.
Typically, some federal employees continue to work in the event of a downtime, but their salary will be retained until the end of the standstill, while other federal employees will be taken on leave, meaning that they are actually on leave without pay. The congress may be ordered to pay employees on leave after the standstill, but this is not guaranteed.
Some affected departments have provided information to explain how the shutdown occurs.
An administration official told CNN before the stalemate began that "a majority of DHS activities would continue" if funds went out.
"For example, those who protect our borders with Customs and the Border Guard will continue to do so," the official said.
And despite the impact on the Ministry of Justice, Special Counsel Robert Müller's office will continue to work.
Müller's office "is funded by permanent indefinite acquisition and would be unaffected in the event of closure," a Justice Department spokesman told CNN.
The stalemate on holiday trips is having an effect ?
Traffic Safety Authority will review passengers Federal Aviation Administration air traffic controllers will direct aircraft.
Amtrak, a federal corporation that is not a state agency, will be open. The inspectors of the Federal Railway Administration will continue to work.
US Customs and Border Guard checkpoints will remain open to international travelers, and the State Department will continue to handle passports.
How many federal employees will be affected?
An estimated 800,000 federal employees may be affected by the partial cessation, either by working until the end of their pay or by being fired.
More than 420,000 government employees are expected to work at a partial standstill without pay, according to a bulletin released by the Senate Central Committee Democrats.
This estimate includes more than 41,000 state law enforcement and law enforcement agencies. In addition, according to leaflet more than 380,000 federal employees would be put on leave.
Prior to its adjournment on Friday, the Senate passed bills to ensure that federal employees who fled receive their salaries. It was passed unanimously, but still has to pass the house. The action was discussed by Democratic Sens., Chris Van Hollen and Ben Cardin, representing Maryland, where many federal officials live in the DC area.
CNN's Ted Barrett, Manu Raju, Phil Mattingly, Sophie Tatum, Gregory Wallace and Ellie Kaufman have contributed to this report.