You also have to pay back the principal on any debt maturing, probably no small sum.
Clearly this is political posturing on both sides.
As long as we (the IRS) is collecting tax revenue, we will not default.
Principal payments on maturing debt will be refinanced by the FED and it’s QE* policies.
Sometime maybe, but it can be rolled over now. It would be trouble if the interest rate goes up, but Ben Bernanke won't let that happen.