Just got an email from UA titled "An Update on the Government Shutdown from Scott Kirby to United Employees".
Of note, Kirby said the following:
United's long-haul international flying and our hub-to-hub flying will not be impacted by this schedule reduction direction from the FAA. That's important to maintain the integrity of our network, give impacted customers as many options as possible to resume their trip, and sustain our crew pairing systems.
Instead, we will focus our schedule reductions on regional flying and domestic mainline flights that do not travel between our hubs.
I've got a hub-hub Saturday I'm not as worried about now, but a hub-non hub on Sunday morning which is not a bit uncertain...Thankfully it's mainline, but still.