As usual NPR is so busy grinding its axes that it is getting the facts completely wrong.
No the Treasury brings in PLENTY of money to pay the US debt. It posts balance sheets daily for the public to read on its website so any of us can see that for ourselves. There is no risk of not being able to pay debts.
Yes, the president might have to make some choices as to where to spend money since Congress never passed legislation to fund all of the programs that congresspeople have been crowing about for the last year, but that's really why we should stop electing such jerks who make big promises that they can't keep.
But it needs to be very clear that the US is not legally at risk of defaulting. The administration threatening that is extremely irresponsible.