Transportation Secretary Sean Duffy visited Washington's Reagan National Airport on Friday morning as flight reductions take place at airports across the country.

"I want to hear about the passenger experience. What can we do better and get their feedback? I think that's always important to hear from the experience of the American traveling public," Duffy told reporters.

Duffy defended the administration's decision to direct airlines to cut 10% of their flights at the high-impact airports no later than Nov. 14.

"It is not a science. It is an art that we're trying to deploy to keep people safe in the airspace ... and we're trying to prevent the pressure that we now see building in the system," he said.

"These are the recommendations that have come from the FAA safety team, but you want us to look at what we see with regard to data and make really good decisions to keep people safe. That's what we've done today. I think it's the right decision," Duffy added.

President Donald Trump is once again calling on Senate Republicans to "Terminate the Filibuster" as the government shutdown stretches on, in multiple social media posts on Friday morning.

"Just say NO (Nuclear Option!). TERMINATE THE FILIBUSTER!," Trump wrote in one post.

The posts come ahead of a 15th vote on government funding in the Senate, though exact timing on the vote is unclear.

-ABC News' Michelle Stoddart

After a judge's ruling requiring the administration to make a payment to fully fund SNAP for the month by Friday, Vice President JD Vance argued courts shouldn’t be allowed to direct the administration on how to "triage the situation" amid the government shutdown.

"It's an absurd ruling, because you have a federal judge effectively telling us what we have to do in the midst of a Democrat government shutdown, which what we'd like to do is for the Democrats to open up the government of course, then we can fund SNAP, and we can also do a lot of other good things for the American people. But in the midst of a shutdown, we can't have a federal court telling the president how he has to triage the situation," Vance said on Thursday night.

"We're trying to keep as much turned on. We're trying to keep as much going as possible, the president and the entire administration are working on that, but we're not going to do it under the orders of a federal judge. We're going to do it according to what we think we have to do to comply with the law, of course, but also to actually make the government work," he said.

-ABC News' Lalee Ibssa

The Senate is staying in tomorrow for a relatively rare Friday session. Majority Leader John Thune told members in a separate closed door lunch that he plans to put up, for a 15th time, a short-term funding bill that would reopen the government.

If Democrats provide 60 votes, there's a number of changes that senators are hoping to make to the bill.

The bipartisan group of rank-and-file senators who have been negotiating a way out of the shutdown are mulling over a number of modifications to the bill. Lawmakers are expected to attempt to change the date that the short-term extension of government funding expires to a yet-to-be-determined later day.

There's also been ongoing discussion about including a package of full-year funding bills in the short-term package that would insure certain programs, including SNAP and veterans programs, are funded through September.

That group has also been in discussion over language that might reverse some of the layoffs of federal employees that the Trump administration imposed as a result of the shutdown. This discussion, which is extremely preliminary and which has not been blessed be leadership, has also been about whether language to prevent future reductions in force could be part of the package.

-ABC News' Allison Pecorin, Rachel Scott and John Parkinson