Reply #8: it depends

[alc]

The administration has a lot of flexibility.

If they want they can stop paying investors which would do a lot of what you say. I don't see this happening at this point.

They could also cut services and live up to all debt obligations. This could actually help with investors. Even though it's only temporary, investors may think the US is willing to cut services to pay the debt.

They can delay accounts payable and salary checks. Part of the plan to get to August is to stop paying into a number of union pension funds.

I'd guess they will pick the services that will make the biggest news story without a lot of harm and cut them. For example, the non-Pell grant part of education is over $30 billion. They could take $5 billion and claim the republicans are hurting education. It would put a lot of pressure on local and state education programs but they can mostly get by until the debt ceiling is raised. The dept of education would prioritize what they do have to keep the worst needs funded. They'll close parks and museums. Not a huge savings but will affect a lot of people with summer vacation plans. They can stop some infrastructure projects but will be questioned about their "laser-like focus on jobs" if they do too much.
I think it would be smart to cut war funding. Then they'd get republicans arguing to raise the ceiling although it would cause the argument that "they hate the soldiers". Instead I expect them to cut social programs, delay payments on anything they can "fix" later like pensions.