ORLANDO, Fla. — A shutdown showdown is looming this week in Washington, D.C.

At stake are impacts to hundreds of thousands of government employees and several federal agencies, including NASA.

Workers at the Kennedy Space Center would be forced to stay home Christmas week and there is no guarantee they would get back pay.

In previous government shutdowns, only 38 Kennedy Space Center employees were exempt out of the 1,970 employees.

The potential shutdown would not impact Tuesday's planned SpaceX launch, but it could slow down launches planned in the new year.

The reason for the shutdown is a battle between President Donald Trump and Democrats over border security.

The president wants $5 billion to build a wall at the U.S. Mexico border to fulfill a campaign promise.

Democrats have proposed no more than $1.6 billion for border security, but not for a wall.

"We're going to do whatever is necessary to build the border wall to stop this ongoing crisis of illegal immigration," Stephen Miller, senior adviser to Trump said on CBS' "Face the Nation."

Coincidentally, if the government is shutdown, another one of the agencies that would be impacted would be Homeland Security.

Tens of thousands of customs and border protection agents would be required to work without pay during the holidays.

The Departments of Transportation, Agriculture, State and Justice, as well as national parks would also be a part of the shutdown.

Congress did fund some agencies, so there would be limited impacts to Defense, Labor, Health and Human Services and Education.

Lawmakers this week will consider a stopgap bill to extend funding until January.

The deadline to fund the government is this Friday.