NASA and shutdowns

U.S. Government Shutdown Won’t Impact ISS Operations
Jan 18, 2018 Mark Carreau | Aerospace Daily & Defense Report
http://aviationweek.com/awinspace/us...iss-operations

On Thu, 18 Jan 2018 23:43:42 -0500, JF Mezei
wrote:

Out of curiosity, how much of NASA is affected in the case of a
government shutdown?

Lets assume government shuts friday night. Lets assume NASA is to launch
some space proble on Sunday, a once in a lifetime oppportunity due to
alignment of planets/stars.

Would NASA be a "business as usual" for some time like Amtrak and Post
Office because they are already funded and don't need day-to-day funding
? Or would they have to justify that X staff are essential for this
launch, and all others would be furloughed?

Similarly, I assume mission control for ISS would be "essential". What
about experiment focused "mission" controls? Would they too be
considered essential and funded or would all experiments be put on hold
on ISS?